By Ronald Eisenberg JD MD FACR, Alexander Margulis MD
Scientific imaging now performs a huge position in prognosis, selection of remedy, and follow-up. despite the fact that, sufferers are usually intimidated through the a number of imaging modalities to be had, the indicators for his or her use, the implementing apparatus, what the examinations are like and the way lengthy they final, and the benefits and downsides of assorted approaches. This ebook is designed to supply causes for those and different concerns with a view to relieve a number of the nervousness concerning scientific imaging reviews.
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Extra resources for A Patient's Guide to Medical Imaging
In many cases, endoscopy has replaced the upper GI series. In some centers, the upper GI series is now performed primarily to demonstrate complications of weight-reduction (bariatric) surgery, such as excessive narrowing or obstruction of the stomach and perforation through its wall (Fig. 2-16). Why Am I Having this Test? An upper GI series is most often performed to discover the cause of such symptoms as difﬁculty swallowing, vomiting, heartburn, and abdominal pain. Your physician may order an upper GI series if your clinical symptoms suggest: • Hiatal hernia (causing reﬂux of acid stomach contents that irritates the inner lining of the esophagus) • Peptic ulcer • Tumor • Obstruction A B Figure 2-16.
You may either be sitting or lying down for the initial placement of the catheter, depending on your comfort and the preference of the radiologist. The radiologist will then push the tube through the stomach and into your small intestine, frequently checking its position under the ﬂuoroscope. When the tube is in the proper place, it will be taped to your nose. The tubing is then connected to a machine, which will ﬁrst administer the barium and then the methylcellulose or air. As the barium ﬂows in, your abdomen may feel bloated.
7 Nuclear medicine lung scan 2 CT (head) 2 CT (chest) 8 CT (abdomen or pelvis) 10 CT (cardiac) 18–22 other imaging examinations, is very small, and there are no data showing that medical imaging actually causes cancer. It is extremely difﬁcult to estimate the risk of causing cancer, because most of the radiation exposure received from medical imaging studies is close to background levels. At these low doses, the risk of radiation-induced cancers is so low that, even if it exists, it cannot be easily distinguished from normal levels of cancer occurrence.