A 50-year-old man with postprandial abdominal pain, weight loss, and generalized body ache was referred to Nuclear medicine department for a whole body bone scan to look for any malignancy. Clinical examination did not reveal any specific positive findings. He underwent aTechnetium-99m Methylene Diphosphonate (99mTc-MDP) bone scan which showed no obvious bone pathology. But there was...

The administration of iodinated contrast media (CM) is a standard component of many computed tomography (CT) examinations. The large number of procedures performed each year and the infrequency of adverse events attests to the safety of CM. However, a small number of patients experience adverse events that are directly related to the CM or the procedure being performed. In this chapter, we exam...

Carotid magnetic resonance imaging (MRI) is used to noninvasively assess atherosclerotic plaque fibrous cap (FC) status, which is closely related to ischemic stroke. Acquiring anisotropic voxels improves in-plane visualization, however, an oblique scan plane orientation could then obscure a FC (i.e., contrast below the noise level) and thus impair a reliable status assessment. To quantify this,...

fundal gallbladder abnormalities result from broad spectrum of pathologic that most of them have no pathological significance and normally causes no symptoms. conversely, early incidental detection of malignant lesions is important because symptomatic lesions are often incurable. so use proper imaging to differentiate between them is important. although ultrasound has been the choice screen met...

W e would like to report a 20-year-old female presented with gradually progressive left renal angle tenderness for two years. Examination revealed fullness in the left renal angle and the ultrasound scan showed severe left hydronephrosis with a normal caliber ureter. Abdominal CT scan was arranged and 40 cc of 350 mg I/mL of injection iohexol was injected intravenously prior to the scan (Fig. 1...

This study was performed to optimize scan delays for canine kidney by using a bolus-tracking technique. In six beagle dogs, computed tomography (CT) of the kidney was performed three times in each dog with different scan delays after a bolus-tracking trigger of 100 Hounsfield units (HU) of aortic enhancement. Delays were 5, 20, 35, and 50 sec for the first scan, 10, 25, 40, and 55 sec for the s...

OBJECTIVES The goal of this work was to reduce the scan time of contrast-enhanced whole-heart coronary magnetic resonance angiography (MRA) by using a gradient echo interleaved echo planar imaging (GRE-EPI) sequence at 3 T field strength. MATERIALS AND METHODS A GRE-EPI sequence was optimized to acquire contrast-enhanced whole-heart coronary MRA at 3 T. First-order phase correction was used f...

mediastinal lymphangioma is primarily a benign lesion and the majority of the cases are found incidentally. these lesions account for approximately 1% of all mediastinal tumors. here we present a giant mediastinal cystic mass in a 35-year-old female who was presented with severe respiratory distress. on the plain chest radiography and ct scan, a massive left pleural effusion with large paraster...