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Biomedical subjects

G Rossi

Publications and source records attributed to G Rossi.

At least 991 records · Page 55Linked to original sources
PubMedDate not supplied

[Mantle irradiation with 18 MeV photons. Measurement and calculation of dose distribution].

Dose distribution in mantle fields irradiated with 18 MeV photons has been studied in an Alderson-Rando phantom with thermoluminescent dosimeters. The treatment was also simulated on an RT-plan 7000 computer; calculated and measured doses in anatomical sites of major interest were compared. Doses in all significant points were within +/- 7% of the doses at the reference point. Calculated and measured doses agreed within +/- 5% except points situated near unhomogeneous tissues. The authors discuss their results and present conclusions about algorithms for computer dose calculation in irregular field treatments.

Computers↗
PubMedDate not supplied

[Clinical significance of the enlargement of the descending pulmonary artery in pulmonary embolism].

The authors reviewed chest radiographs of 158 patients with clinical suspicion of pulmonary embolism, subsequently confirmed in 73 and excluded in 85. Right descending pulmonary artery, measured at 4 different levels, was significantly enlarged at acute embolization in respect to either the diameter showed at recovery and the upper normal limit reported in literature. Moreover, the artery was significantly wider in embolic than in non embolic patients. In addition, the shape of this artery was modified in embolism, since the prevailing enlargement of its upper sections caused the artery to take a truncated cone appearance. "Sausage" appearance of the artery, never found in non embolic patients, was specific for embolism. The radiographic width of the descending pulmonary artery enabled also to identify patients most seriously ill, since it showed a positive linear correlation with the degree of perfusion impairment.

Adult↗