Faculty Bibliography

The current status of nuclear renal scanning and function evaluation is summarized. The indications for renal imaging are discussed. Techniques for measurement of split and total renal function are reviewed. Special attention is given to the role of renography (conventional and diuretic) in the evaluation of the obstructed kidney

Gastroesophageal reflux was a fortuitous finding on a hepatobiliary scan in a patient who had a history of esophagogastrectomy and complained of regurgitation in the supine position

To define the group of patients at high risk for myocardial infarction (MI) and death associated with abdominal aortic aneurysm repair, resting gated blood pool studies were obtained on 50 such aneurysm patients preoperatively. The results indicated that three groups could be distinguished among these patients by cardiac ejection fraction. Group I (n = 25) had preoperative ejection fractions ranging from 56% to 85%. None of the patients in group I suffered an acute perioperative MI. Group II (n = 20) comprised patients with ejection fractions ranging from 36% to 55%. There was a 20% incidence of MI in group II but no cardiac deaths. Group III included five patients with ejection fractions ranging from 27% to 35%. There was an 80% incidence of perioperative MI in these patients, with one cardiac death and one cardiac arrest. All perioperative MIs occurred within the first 48 hours after surgery. In addition there was a 50% incidence of perioperative MI among all those patients who were 80 years of age or older. These results indicate guidelines for the management of patients undergoing abdominal aortic aneurysm repair based on their preoperative ejection fraction. The data further suggest that the noninvasive gated blood pool method of determining ejection fraction may serve a more broadly useful function in helping to determine which of those patients about to undergo major surgical procedures are at high risk for perioperative MI

Methods for creating ventilation/perfusion ratio images have been reported previously using radioxenon. With the availability of 81mKr gas, corresponding ventilation and perfusion views in multiple projections to evaluate for V/Q mismatch may be performed more readily. A technique for the creation of a functional V/Q ratio image to highlight V/Q mismatches to aid in the evaluation of pulmonary embolism is described. By removing nonpertinent and distracting information and by converting a 'cold spot' imaging modality to a 'hot spot' modality, these functional images aid in the synthesis of the information provided by the ventilation and perfusion images. The limitations due to technical artifacts and the advantages of using these functional images are described

We report a bone scan finding of bilaterally and symmetrically increased uptake at the lateral orbital rims in a patient with disseminated Hodgkin's disease. Computerized axial tomography (CT) demonstrated lacrimal gland enlargement, presumably due to infiltration by Hodgkin's disease. Both the radionuclide bone scan and CT findings, as well as the other physical and radiographic manifestations of Hodgkin's disease, resolved after chemotherapy. Infiltration by Hodgkin's lymphoma is a rare cause of lacrimal gland enlargement. We believe that this pattern of uptake on a routine bone scan should alert the physician to possible lacrimal gland disease, which could then be more definitively evaluated by CT examination

A case of antibiotic-associated pseudomembranous colitis is presented in which the Gallium scan was the first diagnostic modality to alert the clinicians to the existence of an inflammatory bowel process. The mechanism of localization of the radiopharmaceutical in inflammatory bowel disease is discussed. Although colonoscopy is far more specific and should be the first-line diagnostic tool used in assessing the presence of pseudomembranous colitis, Gallium scanning may have a role in the follow-up of treatment and in cases of relapse

Marked retention of radioxenon by the skeletal structures during a routine ventilation scan is described. Xenon uptake by bones occurs largely in the intraosseous fat. Augmented uptake in this case may be related to the patient's prolonged steroid therapy

This program represents a system for cross-indexing journals magazine articles or other information. The system was written using BASIC-E, a CP/M-based compiler, primarily for its ready availability, simplicity of disk I/O coding and relative speed of operation. However, the system could be implemented, with relatively minor changes, on any disk-based BASIC computer supporting random access files