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Biomedical subjects

A F Govoni

Publications and source records attributed to A F Govoni.

At least 19 recordsLinked to original sources
PubMed1990

Diagnostic quality of mammograms obtained with a new low-radiation-dose dual-screen and dual-emulsion film combination.

We evaluated the image quality of mammograms made by using a new dual-screen, dual-emulsion film combination (Kodak Min-R Fast screen, T-Mat Mll film) that permits reduction of radiation exposure by approximately 50% when compared with a standard single-screen, single-emulsion film system (Kodak Min-R screen, OM-1 film). This new film has been improved when compared with earlier T-Mat M film, including the introduction of an inert dye to reduce light crossover to essentially 0%. Mammogram pairs made with the dual-emulsion film combination and the standard single-emulsion film combination were obtained in 50 patients otherwise undergoing routine mammography. The image pairs were randomized and evaluated by three radiologists who used a three-point scale (better, same, or worse). Each pair was evaluated with regard to parenchymal contrast, sharpness, and latitude, as well as the number and sharpness of calcifications (n = 19) and sharpness of masses (n = 12) when present. All three observers found the dual-emulsion film combination to be better than or the same as the standard with regard to parenchymal sharpness (94-100%), the number and sharpness of calcifications (98-100%), and sharpness of masses (100%). Two observers found the dual-emulsion film combination to be significantly worse (p less than .05) than the standard with respect to parenchymal contrast (72%, 86%), and all three observers rated it significantly worse for film latitude (14 to 42%). Our results suggest that this new dual-emulsion film combination that allows mammography to be performed with less radiation exposure can be used without loss of image quality.

Breast↗
PubMed1977

Ischemic colitis associated with sigmoid volvulus: new observations.

Ischemic colitis following conservative management of sigmoid volvulus is documented in four cases. Repeat barium enema studies in these patients showed characteristic "thumbprinting", transverse ridging, and mucosal ulcerations within a segment or the entire length of the sigmoid, lasting up to 7 days after nonoperative decompression. The development, extent, and severity of the ischemic changes seem to correlate with the degree of volvulus, blockage of venous and arterial circulation in the sigmoid mesocolon, and increased intraluminal pressure.

Adult↗
PubMed1976

Benign lymphoid hyperplasia of the duodenal bulb.

Four cases of benign lymphoid hyperplasia (BLH) of the duodenal bulb are reported. The roentgen findings of this entity are presented and the literature on BLH of the gastrointestinal tract is briefly reviewed.

Adult↗
PubMed1976

Pseudopneumobilia.

Demonstration of a lucent tubular shadow projected over the liver on plain films of the abdomen would suggest air in the common hepatic and bile ducts. Occasionally, however, the normal periductal fat which surrounds and follows these ducts like a sleeve can simulate pneumobillia. Intravenous cholangiography should confirm the true nature of the entity.

Adipose Tissue↗
PubMed1975

[Benign extrinsic lesions of the large bowel simulating a carcinoma of the colon. Report of 16 cases (author's transl)].

Sixteen cases of benign extrinsic lesions involving the colon and producing roentgen findings simulating a neoplasm are reported. The literature is reviewed. In 5 cases the pathologic process proved to be an inflamed epiploic appendage, in 4 a "congenital" band, in 3 adhesions, in 2 pancreatitis and, in one case each, an old pericecal abscess and an endometriosis.

Acute Disease↗
PubMed1975

Diffuse small bowel involvement in malignant histiocytosis.

The extremely unusual patient reported here had malignant histiocytosis with extensive gastrointestinal involvement. The presenting symptoms were those of a gastrointestinal disorder and barium studies of the upper gastrointestinal tract revealed an infiltrative process of the entire small bowel. A biopsy of the small bowel demonstrated abnormal malignant cells and the diagnosis of malignant histiocytosis was considered and confirmed at postmortem. Strongyloidiasis, which was also found in this patient, may represent a hyperinfestation phenomenon due to altered host-parasite balance.

Adult↗