Diagnostic Imaging: Introduction. Contents. Conventional Radiography Computed Tomography Ultrasonography Magnetic Resonance Imaging Nuclear Medicine. Conventional Radiography . Fluoroscopy Mammography Contrast Studies. Contrast Studies. Barium suspensions
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US-guided core biopsy or fine-needle aspiration (FNAC)
An AP film from an intravenous urogram taken at 10 minutes in a pt. with a proximal Lt ureteral calculus (arrow) and associated left collecting system dilatation. The right collecting system is normal, and the right ureter (arrowheads),bladder are seen.
Contrast-enhanced CT image of the upper abdomen demonstrates two low-attenuation areas (M) confirmed as multiple hepatic metastases from gastrointestinal stromal tumor.
A transverse ultrasound image of the gallbladder demonstrates a gallstone (arrow) with the characteristic distal acoustic shadowing (S) because sound waves cannot penetrate the gallstone.
d. The uterus, demonstrates a gallstone (adnexa, and routine fetal examinations by using a transvaginal probe in the presence of an empty bladder.
f. Transesophageal echocardiography is used for evaluating cardiovascular abnormalities after placement of a probe into the esophagus.
g. Three-dimensional ultrasound (3D-US) is widely used in obstetrics and vascular imaging.
eg. intracranial aneurysm clips, intraorbital metallic foci, cardiac pacemakers, or specific types of cardiac valves.
e. gastrointestinal bleeding studies for detection and localization of small bleeds,
f. lymphoscintigraphy to identify sentinel lymph nodes for surgery, and
g. parathyroid scans to identify adenomas and hyperplasia.
A localization of small bleeds, 99mTc-MDP bone scan in the anterior and posterior projections demonstrates multiple foci of increased radiopharmaceutical accumulation (spine, ribs, pelvis, and left clavicle) with the typical appearance of bone metastases.