[Evaluation study of abnormal detectability with Thurstone and Scheffé (Nakaya) of paired comparison method using chest phantom].

Monitors are increasingly being used as diagnostic imaging devices. In this study, using an all-purpose liquid-crystal display (LCD), the rate of detection of abnormalities was investigated using Thurstone's and Scheffé's (Nakaya) paired comparison methods. A chest phantom was prepared as a test sample with acryl and aluminum plates and intensities suggesting small adenocarcinomas.

Reliability of airway occlusion pressure as an index of respiratory motor output.

Background: Airway occlusion pressure 0.1 s after the start of inspiratory flow (P0.1) is used as an index of respiratory motor output; however, the reliability of P0.

Enhanced expressions of apelin on proliferative hepatic arterial capillaries in human cirrhotic liver.

Aim:   Apelin (APLN), the endogenous ligand of angiotensin-like receptor 1 (APJ), is a peptide necessary for embryonic and tumor angiogenesis. Little is known about the localization and changes of APLN expression including the sinusoids in human cirrhotic liver, which might contribute to portal hypertension. This study was designed to elucidate the localization and change of APLN expression in human liver during the progression of cirrhosis.

[Development of computer assisted learning program using cone beam projection for head radiography].

We present a computer assisted learning (CAL) program to simulate head radiography. The program provides cone beam projections of a target volume, simulating three-dimensional computed tomography (CT) of a head phantom. The generated image is 512 x 512 x 512 pixels with each pixel 0.

[Estimation of appropriate dose for computed radiography by the threshold value of the image quality figure].

We estimated the optimum dose for imaging with a computed radiography (CR) system at two different pixel sizes based on the area under curve (AUC) in receiver operating characteristic (ROC) analysis and image quality figure (IQF). Samples for ROC analysis were prepared as follows. Acryl beads, 2.

[Experimental study of the influence on pacemakers of X-rays from angiocardiography equipment].

We performed an experimental study of the influence on pacemakers (PM) of X-rays from the angiocardiography equipment. (1) We used one PM of DDD mode in this study. (2) The PM was irradiated under two exposure levels: one the standard dose and the other the maximum dose in the angiocardiography study situation.