Clinical Applications of Medical Imaging by Jeffrey Bisker M.D. (auth.)

By Jeffrey Bisker M.D. (auth.)

The fundamental function of this ebook is to bridge the distance be­ tween the perform of medical medication and diagnostic radi­ ology. it's meant essentially for usage through clinical scholars in education and by way of nonradiologist physicians. during this global of speedily increasing wisdom within the many specialties of medication, it truly is changing into more and more tricky for lots of physicians to stick abreast of the more recent and continually altering modalities of prognosis in addition to the healing regimens of the typical in addition to the fewer universal illness procedures inside of their realm of perform. This publication will let the busy clinician to make use of the consultative prone provided through his or her colleagues in diagnostic radiology with greatest effectiveness. the most typical scientific functions of the more moderen imag­ ing modalities (i. e. , nuclear drugs, ultrasound, comput­ erized tomography, and magnetic resonance imaging) were categorised and condensed right into a structure that might be either understandable and worthy every day for these physicians in many instances inquiring for those diagnostic examina­ tions for his or her sufferers. For simplicity, the publication is split, each time possible, into organ structures and subdivided into the a number of classifications of pathologic states (i. e. , con­ genital, trauma or iatrogenic, inflammatory, and neo­ plasm). furthermore, there are short reviews with regards to the vii particular merits and drawbacks in addition to the price effectiveness of every modality.

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Computerized Tomography Postoperative patients and those having experienced recent trauma are usually most easily and adequately evaluated with CT owing to the lack of interference from bandages and bowel gas. In addition to detection of the pres- Figure 2-1. Low-density area in right lobe of liver (arrow) representing hematoma in massively traumatized patient. 18 I CHAPTER 2 ence of hepatic hematoma or laceration (Fig. 2-1), the presence of free blood within the abdomen or injuries to other organs such as the kidneys or pancreas can be readily detected owing to the excellent cross-sectional anatomic display of the abdomen.

Complications of acute cholecystitis such as hydrops of the gall bladder or perforation with pericholecystic abscess formation can also be more readily detected. l Ultrasound CT has very limited utilization in the evaluation of inflammatory disease of the gall bladder, although occasionally stones or complications secondary to acute cholecystitis such as gall bladder perforation can be visualized with CT. Computerized Tomography At this time, controversy rages over which imaging modality is the preferred method to evaluate dilated bile ducts.

Radiographic evaluation of the liver prior to the era of newer imaging modalities had always utilized changes produced by the enlarged liver on the neighboring visceral organs such as the colon or right kidney. Diagnosis of hepatic disorders usually resulted in resorting to more invasive modalities such as angiography, trans hepatic cholangiography, and liver biopsies. Fortunately, with the newer imaging modalities, the liver can now be directly visualized and evaluated, resulting more often in tissuespecific diagnoses without having to resort to more invasive procedures.

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