Calculating patient-specific organ doses from adult body CT scans by Monte Carlo analysis using male-individual voxel phantoms.

Computed tomography (CT) dose calculators such as the WAZA-ARI are useful for estimating the radiation dose from CT examination. This study determined correction coefficients for estimating organ doses to patients of any size attended to in daily clinical practice. To this end, the authors constructed voxel phantoms based on the CT images of patients of different size and simulated radiation transport in CT examinations to obtain organ doses using Monte Carlo simulation.

[Obesity as one of the risk factors for urolithiasis].

Background: It is well known that many diseases may be associated with obesity resulting from an energy-rich diet, and that a westernized diet may increase the incidence of urinary stone formation. To evaluate degree of obesity, we investigated body mass index (BMI) in patients with calcium containing upper urinary stones and examined their blood with regard to lipid metabolism.

Methods: Between July 1994 and December 1995, we analyzed 332 fresh renal-stone formers (253 males and 79 females) who visited 7 hospitals located in Ehime prefecture.

[Extracorporeal shock wave lithotripsy in a patient with hemophilia A. A case report].

We treated a 25-year-old hemophilia A patient (FVIII:C activity 2%) with left ureteral stone by means of extracorporeal shock wave lithotripsy under replacement therapy of concentrated Factor VIII material. The patient was attacked by sudden onset of left renal colic with gross hematuria on the 12th postoperative day. Renal ultrasonography and computed tomography demonstrated subcapsular bleeding of the left kidney.

[Embolotherapy of varicocele by stainless steel coil].

Fifty-two patients with varicocele underwent embolotherapy using stainless steel coils. Forty-six of the patients complained of infertility, four of scrotal mass and two of scrotal pain. The procedure was successful in 42 of the 52 patients (81%).