5 results match your criteria: "Shizuoka College of Medicalcare Science.[Affiliation]"
Development of a three-dimensional dose evaluation method for computed tomography.
J Appl Clin Med Phys
February 2023
Department of Ultrasound, Ono Memorial Hospital, Nishiku, Osaka, Japan.
During a single scan using computed tomography, an X-ray tube orbits along a 360°-circular path around the patient. A scan obtained using the half-cylindrical type phantoms with a radiochromic film sandwiched in between reveals a pixel value map illustrating the two-dimensional (2D) dose distribution. A three-dimensional (3D) dose distribution can be obtained with a 360° rotation of the 2D dose map.
View Article and Find Full Text PDFA nationwide study of obstetric management and outcomes in premature rupture of membrane at term: Report from the Perinatology Committee, Japan Society of Obstetrics and Gynecology, 2017-2018.
J Obstet Gynaecol Res
January 2023
Perinatology Committee, Japan Society of Obstetrics and Gynecology, Tokyo, Japan.
Article Synopsis
- This nationwide study in Japan examined how healthcare facilities manage term premature rupture of membrane (PROM) and its effects on maternal and neonatal health outcomes.
- The survey of 415 facilities revealed that most hospitals followed a management protocol that allowed up to 3 days for delivery after PROM and emphasized addressing bacterial infections.
- Results indicated that waiting up to 48 hours for labor after PROM did not raise the risk of complications like postpartum fever when compared to immediate labor induction.
USE OF ULTRAVIOLET RAY PRE-IRRADIATION TO IMPROVE THE ACCURACY OF LOW-DOSE MEASUREMENTS OF THE CT USING A GAFCHROMIC RTQA2 FILM.
Radiat Prot Dosimetry
August 2021
Department of Radiology, Osaka Center for Cancer and Cardiovascular Diseases Prevention, 1-6-107 Morinomiya, Jyoto-ku, Osaka 536-8588, Japan.
The purpose of this study is to develop a method for use at extremely low-dose ranges and to decrease the uncertainty outside the recommended range of Gafchromic RTQA2 (RTQA2). By this method, the CT dose including the scattered radiation region can be grasped. The base density was increased by ultraviolet (UV)-ray preirradiation.
View Article and Find Full Text PDFTHE CONCEPT OF X-RAY CT DOSE EVALUATION METHOD USING RADIOCHROMIC FILM AND FILM-FOLDING PHANTOM.
Radiat Prot Dosimetry
January 2021
Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan.
In this paper, we propose a novel radiochromic film (RCF)-based computed tomography (CT) dosimetry method, which is different from the method based on CT dose index. RCF dosimetry using Gafchromic QA2 films was performed using two lengths of film-folding phantoms. The phantom was exposed to X-ray CT through a single scan, while the RCF was sandwiched between the phantoms.
View Article and Find Full Text PDFSynthetic MRI with T-based Water Suppression to Reduce Hyperintense Artifacts due to CSF-Partial Volume Effects in the Brain.
Magn Reson Med Sci
December 2021
Department of Radiological Science, Shizuoka College of Medicalcare Science.
Purpose: Our purpose was to assess our proposed new synthetic MRI (synMRI) technique, combined with T-based water suppression (Twsup), to reduce cerebral spinal fluid (CSF)-partial volume effects (PVEs). These PVEs are problematic in the T-weighted fluid-attenuation inversion recovery (FLAIR) images obtained by conventional synMRI techniques.
Methods: Our Twsup was achieved by subtracting additionally acquired long TE spin echo (SE) images of water signals dominant from the originally acquired images after T decay correction and a masking on the long TE image using the water volume (V) map to preserve tissue SNR, followed by quantitative mapping and then calculation of the synthetic images.