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Biomedical subjects

S Furui

Publications and source records attributed to S Furui.

At least 73 records · Page 4Linked to original sources
PubMed1988

Hepatic inferior vena cava obstructions: clinical results of treatment with percutaneous transluminal laser-assisted angioplasty.

Three cases of hepatic inferior vena cava (IVC) obstruction (two segmental and one membranous) associated with Budd-Chiari syndrome were successfully treated with percutaneous transluminal angioplasty (PTA) with use of an Nd-YAG (neodymium-yttrium, aluminum, garnet) laser. The occluded portions were canalized by advancing a ceramic-capped delivery system and delivering intermittent laser emissions. The canal was widened by simultaneous inflation of three or four Gruentzig balloon catheters. In two of the three cases, this procedure was done after unsuccessful canalization of the occluded portions by conventional means. Postoperatively, all patients showed disappearance of Budd-Chiari syndrome. One patient also showed marked regression of a huge intraluminal thrombus. There were no serious complications during and after the procedures. Use of the Nd-YAG laser seems to be of value in PTA for the treatment of hepatic IVC obstructions as well as in treatment of arteriosclerotic lesions.

Adult↗
PubMed1988

MR imaging vs CT in subacute sclerosing panencephalitis.

The MR findings in three patients with subacute sclerosing panencephalitis were reviewed and compared with CT findings in the same patients. Long-T2 lesions were demonstrated in each case, although their distribution varied with the clinical stage of the disease. MR, especially T2-weighted imaging, appears to be of great utility in the assessment of subacute sclerosing panencephalitis.

Adolescent↗
PubMed1987

Prominent collateral vein in portal hypertension mimicking liver tumours: a pitfall in computed tomography.

Computed tomography (CT) was performed on four patients with a prominent porto-systemic collateral vein, including three with an enlarged para-umbilical vein. We have observed a pitfall in non-contrast CT scans of patients with portal hypertension, in which a prominent collateral vein may mimic a liver tumour. Dynamic CT as well as magnetic resonance imaging is of great value in such cases.

Diagnosis, Differential↗
PubMed1986

Use of protein A in the serum-in-agar diffusion method in immune electron microscopy for detection of virus particles in cell culture.

A modified technique using protein A in the serum-in-agar (SIA) method for immune electron microscopy (IEM) was presented. Grids coated with staphylococcal protein A were floated on samples mounted on agar containing 2% antiserum and incubated at 37 C, for 60 min. After washing and staining, the grids were observed in an electron microscope. The effects of protein A on virus detection were evaluated using poliovirus and bovine rotavirus infected cell culture fluids. The results showed that the technique using protein A (PA-SIA) had at least 10-fold higher sensitivity for virus detection than the original SIA. The optimal concentration of protein A was 1 to 10 micrograms/ml for coating the grids to trap virus particles. The PA-SIA method was also compared with immunosorbent electron microscopy (ISEM). The former showed higher or at least the same sensitivity and some advantages in detecting antigen-antibody reaction than the latter method. These results indicate that our PA-SIA method may be superior to other IEM techniques presented previously for the detection and identification of viruses.

Adsorption↗
PubMed1986

On the role of spectral transition for speech perception.

This paper examines the relationship between dynamic spectral features and the identification of Japanese syllables modified by initial and/or final truncation. The experiments confirm several main points. "Perceptual critical points," where the percent correct identification of the truncated syllable as a function of the truncation position changes abruptly, are related to maximum spectral transition positions. A speech wave of approximately 10 ms in duration that includes the maximum spectral transition position bears the most important information for consonant and syllable perception. Consonant and vowel identification scores simultaneously change as a function of the truncation position in the short period, including the 10-ms period for final truncation. This suggests that crucial information for both vowel and consonant identification is contained across the same initial part of each syllable. The spectral transition is more crucial than unvoiced and buzz bar periods for consonant (syllable) perception, although the latter features are of some perceptual importance. Also, vowel nuclei are not necessary for either vowel or syllable perception.

Humans↗
PubMed1986

Dynamic CT features of arterioportal shunts in hepatocellular carcinoma.

Dynamic computed tomographic (CT) findings of 42 patients with hepatocellular carcinoma having angiographically proven arterioportal shunt were reviewed. CT findings related to arterioportal shunt were as follows: early enhancement of the portal vein, which showed a time-density curve similar to that of the aorta, markedly prolonged enhancement of the portal vein, dilated, abnormal intrahepatic vessels often accompanied by irregular, transiently enhanced areas, transient high attenuation of lobar or segmental distribution in the lobe contralateral to the main tumor, and transient wedge-shaped enhancement peripheral to the tumor. Dynamic CT usually detected arterioportal shunts involving larger portal veins as represented by any of the first four findings (14 of 17), whereas detection of arterioportal shunts involving smaller portal veins was lower in frequency (8 of 25), but such a shunt could be demonstrated as transient wedge-shaped enhancement peripheral to the tumor.

Arteriovenous Malformations↗
PubMed1986

Single photon emission computed tomography of brain tumors with 201TIC1.

Single photon emission computed tomography (SPECT) with 201TIC1 was performed in 27 patients with brain tumors. Findings on SPECT were compared with those on planar images, computed tomography (CT) and, in 4 cases, magnetic resonance imaging (MRI). At SPECT the tumors were shown as areas with higher accumulation of the tracers than the surrounding brain tissue in 24 cases and a better discrimination was obtained than in planar images. Deep-seated lesions were especially visualized. In some cases SPECT defined lesions that were not clearly delineated on CT or MRI. SPECT with 201TlCl can be of clinical use in the diagnosis of brain tumors.

Brain Neoplasms↗