Overview of Mammography and its Importance

Overview of Mammography and its Importance Mammography is the radiographic imaging of the breasts. It is a special diagnostic and screening tool of the human breasts. A mammography is done with specific x-ray equipment which is able to find tumors too small to be felt. Mammography examinations ultimate goal is the early detection of breast cancer, typically through detection of characteristics masses and / or micro calcifications. A mammogram is the best radiographic method available for early breasts cancer detection. It is ideal and indispensable for women above the age of 40 years old, for whom the risk of breast cancer is increased. Like x-rays, mammogram uses doses of ionizing radiation to create images but at lower dose amplitude-x-rays (most often around 0.7mSv). Radiologists then analyze the produced images for any abnormalities. A longer wavelength x-rays (typically Mo-K) is normally used for mammogram compared to those used in radiography of bones. Like many other medical tests, mammograms are not 100% accurate. The refore, a regular mammogram scheduling is needed to detect any early breasts changes before any obvious signs or symptoms show up. It is also scientifically proven that mammogram can reduce breast cancer mortality rate by more than a third. Despite its function in early detection of breast cancer, mammography has a false-negative (missed cancer) rate of at least ten percent. This is due to the dense tissue obscuring the cancer and the large overlap of cancer appearance in mammograms with normal tissues appearance. Mammography first started in 1960s. However, modern mammography has only existed since 1969 when the first x-ray unit dedicated to breasts imaging was made available to the public. Such examination as a screening device became standard practice by the year of 1976. Mammography then continues to improve as lower dose of radiation able to detect smaller potential problem earlier. Throughout the years, mammography has made advances to further improve its diagnostic ability. Digital mammography and computer aided detection are two examples of recent advances in the field of mammography. Digital mammography, also known as full field digital mammography (FFDM), is a mammography system in which solid-state detectors that convert x-rays to electrical signals replace the conventional x-ray film. These detectors are similar to those found in digital cameras where electrical signals produced are used to create images of breasts which are then projected on a computer screen or printed on a speci al film similar to conventional mammograms. A digital mammogram is essentially the same as a conventional film screen mammogram. Computer aided detection (CAD) systems help to detect abnormalities by using computer software. A digitized mammographic image that can be obtained either from a digitally acquired mammogram or a conventional film mammogram is used by the computer aided systems. The computer software then searches for abnormal areas of mass, density or calcification that may indicate the presence of cancer. It highlights the abnormal areas on the images, alerting the radiologists to the need of further analysis. A special mammography machine is used for the screening of breasts. The machine comprises of an x-ray tube connected to a breasts support which houses the film cassette or imaging device on a C shaped arm, with moveable compression paddle between the two. There are few standard functional requirements for the mammography machine in order to produce a good quality image. The high voltage generator of mammography machine shall supply a near direct current high voltage with ripple less than 5 percent. Most modern mammography machines have a automatic selection for kilo voltage (kVp) output in order to optimize contrast. The generator produces a constant potential and the high voltage applied to the tube must be from 22 to 35kVp in increments of 1kVp. The focal spot size of mammography machine should be as small as possible to ensure adequate resolution. A focal spot size of 0.3mm is recommendable for general mammography and 0.1mm (small focus) for magnification views. The tube current o f mammography machine should be set as high as possible in order to minimize exposure time and thus reducing the likelihood of motion artifact. A moving grid with grid factor of less than 2.5 at 30 kVp is essential to ensure optimum image quality. An automatic exposure control (AEC) is important in mammography machine. This is due to the wide variation in breasts sizes and compositions. There is little scope for mAs selection errors as there is a need for high radiographic contrast and consequently the system has low latitude. As for image recording material, most of the mammography facilities are still utilizing traditional cassettes, intensifying screens and single emulsion film with processing being taking place. Mammography usually uses cassette containing a single intensifying screen and the film which is usually green sensitive has a single emulsion layer. Both these equipment are essential to give optimum resolution. A mammography film requires high spatial resolution. It sho uld has enough speed to ensure that the dose is acceptable without being so fast that it causes visible quantum mottle and high contrast with enough latitude to show both dense glandular tissue and the skin edge. Quality control, assurance programs and strict processing parameters are vital to ensure the standard in film quality is not compromised. Any reduction in film quality may lead to misinterpretation of image and incorrect diagnosis. In the modern days, digital mammography is slowing making its way to the imaging field. This modern modality has some advantages over the conventional film mammography. The examination time and time between examining patients decreases as chemical processing and changeover of cassette is no longer necessary. Markers can be applied on image digitally. Images produced can also be manipulated. One of the major advantages of image manipulation is the ability for image magnification with significantly less unsharpness compared to those associated with macro or magnification images that are sometimes required to demonstrate suspicious areas already seen on mammograms. Unlike the conventional magnification views, digital magnification does not involve an additional exposure to radiation. Patients are required to do some preparations prior to a mammography examination. Fasting or observation in particular dietetic rules days before mammogram examination is not necessary. However, for women sensitive to caffeine, they shall refrain from taking caffeine containing products such as cola, chocolate and coffee two weeks before undergoing the test. This is because caffeine could make the breasts more tender which may affect the quality of radiograph. Menstrual cycle phase usually does not affect the outcome of the examination. However, it is also highly recommendable to schedule for mammogram one week following patients menstrual cycle. This is so as the breasts are less tender compared to that during pre-ovulatory and postovulatory period (half cycle) as well as during premenstrual period. It is also advisable for patients to wear two piece clothing on examination day to ease the undressing process for mammogram. Cosmetics, oils, creams, lotion and talc or deodorant must n ot be applied hours prior to test at the underarms and breasts areas. Failure in doing so may result in those appearing in mammogram as calcium spots. Patients are also encouraged to bring along all previous mammograms for comparison purposes by the radiologist. Most often, mammograms are done on older patients compared to younger patients. this is due to the breast tissue changes during life. The breast tissue density in younger women often makes mammogram rather difficult to interpret. However, as women age increases, some changes in the structure of breasts occurs as glandular and fibrous tissues reduce in size and this results in breasts tissues become more fatty. On the examination day, a simple interview with the patients is conducted before the examination takes place. They will be asked on any prior surgeries history, family or personal history of breasts cancer as well as hormone use. It is also the responsibility of the radiographer or technologist to enquire the patients last menstrual period as to determine whether the patient is pregnant. Pregnant patients are not recommendable for such examination. Upon completion of the short interview, patients are then ushered to change into hospital gown and remove all potential artifact before proceeding for the examination. When the examination takes place, the breast is compressed using compression paddle on the mammography unit. A parallel plate compression evens out the breast tissue. Compression of breast reduces the thickness of tissue that x-rays penetrate, decreases the amount of scattered radiation, and reduces the required radiation dose and holding the breast (remove movement unsharpness) still and thus improving the image quality. Both craniocaudal, CC view (head to foot) and mediolateral oblique, MLO (angled side view) of the breast are taken in screening mammography. Extra views such as geometrically magnified and spot-compressed views of particular area of concern may be taken in diagnostic mammography. While performing the craniocaudal (CC) view, the mammography unit is positioned with the breast support table (image receptor holder) horizontal and the height adjusted to slightly above the level of patients inframammary angle. The patient is then instructed to face the machine, standing w ith approximately 5-6cm back, feet facing the machine but body rotated 15-20Â ° away from the side under examination. This is so that the breast under examination is brought closer to the image receptor holder and aligned with the center of it. The patients arms hang loosely by her side and head is turned away from the side to be examined. The breast is then lifted gently up and away from the chest wall of patient. While supporting the breast, the height of the machine is adjusted so that the image receptor holder makes contact with the breast at the inframammary fold and the breast is approximately 90Â ° to the chest wall. The breast is then carefully placed in contact with the cassette. Hand is then slowly removed from the breast, whilst ensuring that no skin folds are created underneath the breast. Patients arm of the side under examination is then flexed at the elbow and the hand is placed on the patients lower abdomen or relaxed at the side of the trunk. This relaxes the pect oral muscle. Patients shoulder is gently pressed down to bring the outer quadrant of the breast into contact with the image receptor. Slight pressure is maintained at the patients back to ensure she does not inadvertently pull back from the unit and cause some tissue to be lost from the resultant image. Radiographers thumb is then placed n the medial aspect and middle finger on the superior aspect of the breast, gently pulling forward towards the nipple while the compression is applied slowly. Radiographers other hand is placed on the patients shoulder of the side being examined to ensure that it stays relaxed. The light beam diaphragm can be used during the application of compression. This is to ensure the nipple is in profile, all breast is included in the main beam, both medial and lateral margins are included, no skin folds and an adequate breast compression. A CC marker with left or right identifier is positioned on the axillary edge of the cassette, within the primary beam. Pa tient is strongly advised not to move and the projection is done quickly after that. The same CC procedure is performed on both left and right breast. The CC view with the same procedure is performed on patients both breasts. Besides the CC view, a mediolateral oblique (MLO) view of patients both breasts is also taken for screening mammogram. The positioning of patients for left breast MLO view is to have patient facing the mammography unit with feet pointing towards it. From the position used for CC projection, the unit is rotated through 45Â ° with the x-ray tube on patients right and the beam angled caudally. The height is adjusted to bring the lower border of cassette 2.5cm below the inferior portion of the left breast. It may be necessary to further adjust the height during patient positioning. The lateral edge of the left of the thorax is in line with the image receptor holder so that the left breast also lies next to it. The radiographer then stands behind and slightly to the right of patient. Patient is then asked to raise her left arm and chin. The raising of chin may prevent the superimposition of the mandible over the breast. Patients left breast is then held with right hand and patient is kep t in position by holding on to the right shoulder. Patient who is advised to lean forward into machine with feet still facing forward is asked to lean slightly laterally. The left axilla of patient should lie over the corner of image receptor that is nearest to chest wall. Radiographer then proceeds to life the posterior skin edge of the left axilla to prevent skin folds from occurring. Patients left arm is then pulled across and behind the image receptor holder. Patients elbow is also flexed so that the forearm can be placed on the unit for support and elbow is positioned so that it hangs down comfortably behind the holder. The humeral head is gently pushed forward and the corner of image receptor lies in the axilla, anterior to posterior fold. While the patient maintains the position, radiographer double check to ensure there is no skin fold in the axilla or under the lateral aspect of the breast and to check for and remove any creases at the inframammary angle. The breast is then lifted up and away from the chest wall while holding the patients left shoulder. The breast is then placed on the image receptor and compression is applied. Projection on the left breast is then taken. The same MLO view projection is then repeated vice versa on the right breast of patient. Upon completion of the examination, patient is advised to change back to her clothes. Patient is then escorted out and at the same time patient is informed on her next appointment for the review of results with the radiologist. Any discussion on the results with patient prior to the review of radiologist is prohibited. Mammography has been long known to be an effective modality for breast screening. Such examination improves physicians ability to detect small tumors and early treatment can be performed to reduce mortality rate. Mammogram is also the only proven method to reliably detect tumors as well as all types of breast cancer, including invasive ductal and invasive lobular cancer. Radiation used in mammography examination is of low dosage and usually has no side effects towards patient. Moreover, radiation does not remain in patients body after the examination. Despite its benefits in the purpose of screening and diagnostic, mammography poses certain risks towards its patients. There is a slight chance of cancer from excessive exposure to radiation. The effective radiation dose for this procedure varies depending on the thickness of tissue. However, radiographers are trained to use the lowest radiation dose possible for radiation protection purposes while producing the best images for evaluati on. False positive mammogram is also one of the risks in performing mammogram. Five percent to 15 percent of screening mammograms need more testing such as additional view for mammograms or ultrasound to further determine suspected abnormality. Most of the further tests turn out to be normal. However if there is an abnormal finding, biopsy may be performed on the patient to determine whether the tumor is benign or malignant. Women above the age of 40 are normally advised for a mammogram annually as they pose a higher risk of being diagnose with breast cancer. However, an ultrasound is more preferably performed on patients below the age of 40 as their breasts tissue is denser. Last but not least, women of all age should go for routine breast check up regularly for early detection on any breast abnormalities. Above diagram shows a conventional cassette film mammogram machine. Above diagram shows a Craniocaudal (CC) mammography view in progress. Above diagram shows a Mediolateral Oblique (MLO) view in progress. Above diagram shows a normal (left) mammography image compared to cancerous (right) mammography image.

Personal Statement. The programme of Translation and Interpretation

Some people consider translation as a kind of jobs only but for me, it is a meaningful form of cultural communication. Therefore, I would like to apply to your university for the programme of Translation and Interpretation in order to make my dream comes true. Having majored in Translation and Interpretation as an undergraduate, it brings me new perspectives about translation that it not only translates from one language to another, but also the culture. This makes translation a real challenge. Nevertheless, I dare to embrace challenges and I find fulfillment after completing various translation assignments. Also, I have a passion for it.However, my skills in translation and interpretation are far from good. Therefore, I would love to further my knowledge of language and develop skills in translation through this programme, and I could take my enthusiasm and turn it into my further study. On the other hand, when compare with other colleges, your college is not only focus on practical skills but also theories of translation. I think this is better as theories help us to identify translation problems and justify strategies in order to have better translations. Therefore, I would like to apply to your college for this programme instead of others.Since I am studying Higher Diploma in Translation and Interpretation, I have learnt some basic techniques and theories of how to translate. Besides, I practice all these skills and theories by applying them into assignments and projects. As a result, I will be more able to master this subject than others. Learning new languages is one of my interests . I learnt Japanese and Korean when I was in form three. Now, I am taking a course for learning Spanish and I think these are relevant to this programme. Just like liver Wendell Holmes has said â€Å"Language is the blood of the soul into which thoughts run and out of which they grow†.As language provides an insight into all aspects of a countries culture and this is wh at translation is about, the ability to speak in different languages helps me to study this programme in a more effective way than others. By undertaking this programme, I expect to see myself become a well-trained specialist in this field as my future career, who can make many meaningful contributions to translation and interpretation. Therefore, I have much appreciated being able to achieve my goal by getting into your college for studying this programme. Personal Statement. The programme of Translation and Interpretation Some people consider translation as a kind of jobs only but for me, it is a meaningful form of cultural communication. Therefore, I would like to apply to your university for the programme of Translation and Interpretation in order to make my dream comes true. Having majored in Translation and Interpretation as an undergraduate, it brings me new perspectives about translation that it not only translates from one language to another, but also the culture. This makes translation a real challenge. Nevertheless, I dare to embrace challenges and I find fulfillment after completing various translation assignments. Also, I have a passion for it.However, my skills in translation and interpretation are far from good. Therefore, I would love to further my knowledge of language and develop skills in translation through this programme, and I could take my enthusiasm and turn it into my further study. On the other hand, when compare with other colleges, your college is not only focus on practical skills but also theories of translation. I think this is better as theories help us to identify translation problems and justify strategies in order to have better translations. Therefore, I would like to apply to your college for this programme instead of others.Since I am studying Higher Diploma in Translation and Interpretation, I have learnt some basic techniques and theories of how to translate. Besides, I practice all these skills and theories by applying them into assignments and projects. As a result, I will be more able to master this subject than others. Learning new languages is one of my interests . I learnt Japanese and Korean when I was in form three. Now, I am taking a course for learning Spanish and I think these are relevant to this programme. Just like liver Wendell Holmes has said â€Å"Language is the blood of the soul into which thoughts run and out of which they grow†.As language provides an insight into all aspects of a countries culture and this is wh at translation is about, the ability to speak in different languages helps me to study this programme in a more effective way than others. By undertaking this programme, I expect to see myself become a well-trained specialist in this field as my future career, who can make many meaningful contributions to translation and interpretation. Therefore, I have much appreciated being able to achieve my goal by getting into your college for studying this programme.

Unbiased Report Exposes the Unanswered Questions on Essay Topics for Teenager

Unbiased Report Exposes the Unanswered Questions on Essay Topics for Teenager The Unexpected Truth About Essay Topics for Teenager In high school honors classes, students are going to have book and binder for each class. You expect your kid to obey you with regard to choosing career, subjects, school or college. Children ought to be taught what to do in case the situation arrises. Moreover, many children spend as much time talking on the telephone, texting with friends or playing games, and so do not aware what's going on around them. The Unexposed Secret of Essay Topics for Teenager While it isn't proved, a lot of people think that if one uses antidepressants for quite a long duration of time, they are going to have memory loss. The excessive use of social media has brought about plenty of strain and unhappiness in teens, and there's no excuse for it. There are some who have sleep disorders that impact their capacity to rest. In some folks, sleeping for less hours will lead to poor memory capacity. Understanding Essay Topics for Teenager Not only are there millions of pages dedicated to supplying educational info to teenagers, but in addition personal assistance and data too. A kid can confront lots of risks surfing the web. Once a teenager becomes addicted to the several social media websites in addition to the adult content present on the web, it's needless to say that their social and academic skills are likely to be largely affected by it. As a way to access textbooks on tablets, each is going to have to get accessibility to the internet which raises the danger of students getting of task. Ok, I Think I Understand Essay Topics for Teenager, Now Tell Me About Essay Topics for Teenager! Also, direct and indirect citations are essential to demonstrate your understanding of a particular academic writing style. The very first thing you ought to do is decide on an excellent topic for this essay and you wish to decide on a topic that's unique, r elevant and that is going to attract readers but that's also inside your teacher's guidelines. With our custom made essay offer, you can be certain to get any essay help you're looking for. A smooth transition from 1 paragraph to another is important to a thriving essay because it demonstrates your capacity to clearly express your thoughts. The psychological impact stays the same. Because teens are social and more inclined to be influenced by peers, they are more vulnerable to influences of social networking. One of the principal positive points about teenagers utilizing the web is the abundance of knowledge readily available to them, to which people of the previous generations didn't have access. In addition, there are studies which reveal the negative effect of mobile phones on the well-being of the young ones. There are two sides to each story, every argument and a number of opinions to each topic. Therefore, to compose a great essay you've got to brainstorm all thought s concerning your life experiences. So, it's a remarkable foundation for assorted epic stories! Students who tend to stick to the crowd will locate their individuality on the webpage, because they have the freedom to compose their thoughts without judgment. American teenagers essay is an extensive subject that can be focused on several different elements which impact the teens, their issues and respective areas in which teenagers have gained recognition. A study performed by the National Alliance of Mental Illness in 2011 proved that individuals who feel socially-isolated are at heightened risk of suicide. Child safety online does not quit at age 18. Your essay needs to have a logical conclusion. The Nuiances of Essay Topics for Teenager As more pressure to do builds up, many teens begin to worry if they could possibly succeed. As a consequence, it can be argued out that drug abuse causes damage to human beings and must be avoided at all cost regardless of the simple fact so me folks still believe that drug abuse is harmless. Drug abuse has unfortunately come to be a social norm and the cycle should be put to a finish. In addition, it is harmful because it promotes the spreading of harmful diseases through drugs that have to be injected directly in the body. The Dirty Truth About Essay Topics for Teenager What's truly astonishing about truly being a teenager is that each individual's experience differs. Not every teenager is identical! Only once you fully grasp the youngster, then you may give the acceptable punishment. In teens, it is a challenge to recognize cases of anxiety since they might not say anything in any way or just complain about physical symptoms. What's true about virtually all of teenagers is that it's a time of self-discovery and maturity. To start off, the most significant thing in a kid or teenager's life is to get freedom. In the event the teen is experiencing severe depression then it would be the best to visit a psychiatrist when possible because then he or she'll have the ability to tell one exactly whether the teen demands the antidepressants or not. First of all teens aren't going to adhere to each of the rules, and secondly there are a number of things that certain teens are not going to do with, or without a particular rule on such subject. The Unusual Secret of Essay Topics for Teenager Dependent on the topic one ought to compile data to create a considerable base and argument in the essay. The write-up consists of numerous statistics. Image your CHILD was going to be attacked and they wouldn't be in a position to get hold of you since they don't have a telephone.

Gender Identity - 1270 Words

Gender Identity Introduction This paper will discuss issues dealing with the roles of biological factors, (nature), and environmental influences, (nurture), on sexual differentiation and gender identity. The author, Troy Stutsman, will evaluate and give a determination as to which has the greater influence on gender identity: nature or nurture. Also discussed will be the current arguments about sexual identity and how evidence from biopsychology which may help to resolve the argument. What is gender identity Gender identity is a person’s concept of him or herself whether male or female, this can be either the same as their biological gender or it could be different (Schwartz, 2008). Most of the people out there are satisfied at being†¦show more content†¦At the eighth week the fetus takes a chromosome from the father who can be either an X or a Y (Wickens, 2005). If the fetus takes an X chromosome it will stay a female, but if it takes a Y chromosome it begins making testosterone and other male hormones and will begin to develop as a male. These different hormones work in the brain to create the male sex organs and genitalia (Wickens, 2005). In some situations during gestation a fetus’s brain produces male hormones but the fetus still becomes a female. Other times the fetus does not produce enough testosterone for the fetus to become completely male. This is known as hermaphroditism (Ghosh, 2009). Society today calls this intersex. The greater influence Gender identity can take place as early as during gestation; an ultrasound can allow the gender of a fetus to be determined. This usually takes place during the second semester of gestation. Parents tend to use this information as a means of tailoring their parental planning, including gender-specific names, types of clothing and gender based toys (Ghosh, 2009). A parent’s aspirations pertaining to the infant can change due to the anticipated gender. They develop preformed ideas of the infant’s wants and needs prior to its birth (Ghosh, 2009). Examples of this are; if the ultrasound shows a girl, the parents may want her to become a nurse, but if it were a boy they may plan on him being a baseball player. After the child is born and doctors assign it a specificShow MoreRelatedGender And Gender Identity And Development1303 Words   |  6 Pagesthroughout the years. However, gender identity and development is something that has been both misundersto od and misconstrued by people for quite some time. The differences between â€Å"gender† and â€Å"sex† is quite vast. According to John Carl: Gender is defined as the personal traits and position in society connected with being male or female. For instance, wearing high heels is associated with the female gender, while wearing combat boots is associated with the male gender. 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