Radiological Physics and Technology This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Knowledge-based model building for treatment planning for prostate cancer using commercial treatment planning quality assurance software tools
In conclusion, high-quality treatment plans formulated using PlanIQ as reference facilitated efficient implementation of RapidPlan modeling. (Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - November 8, 2023 Category: Physics Source Type: research

The montage method improves the classification of suspected acute ischemic stroke using the convolution neural network and brain MRI
This study investigated the usefulness of the montage method that combines four different magnetic resonance images into one images for automatic acute ischemic stroke (AIS) diagnosis with deep learning method. The montage image was consisted from diffusion weighted image (DWI), fluid attenuated inversion recovery (FLAIR), arterial spin labeling (ASL), and apparent diffusion coefficient (ASL). The montage method was compared with pseudo color map (pCM) which was consisted from FLAIR, ASL and ADC. 473 AIS patients were classified into four categories: mechanical thrombectomy, conservative therapy, hemorrhage, and other dise...
Source: Radiological Physics and Technology - November 7, 2023 Category: Physics Source Type: research

Dosimetric comparison of four-dimensional computed tomography based internal target volume against variations in respiratory motion during treatment between volumetric modulated arc therapy and three-dimensional conformal radiotherapy in lung stereotactic body radiotherapy
This study focused on the dosimetric impact of variations in respiratory motion during lung stereotactic body radiotherapy (SBRT). Dosimetric comparisons between volumetric modulated arc therapy (VMAT) and three-dimensional conformal radiotherapy (3DCRT) were performed using four-dimensional computed tomography (4DCT)-based internal target volumes (ITV). We created retrospective plans for ten patients with lung cancer who underwent SBRT using 3DCRT and VMAT techniques. A Delta4 Phantom + (ScandiDos, Uppsala, Sweden) was used to evaluate the dosimetric robustness of 4DCT-based ITV against variations in respiratory moti...
Source: Radiological Physics and Technology - November 6, 2023 Category: Physics Source Type: research

Task-based assessment of resolution properties of CT images with a new index using deep convolutional neural network
In conclusion, the RPI, which is a new index that represents the resolution property using the proposed method, can be used to evaluate the resolution of a CT system in a task-based manner. (Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - November 6, 2023 Category: Physics Source Type: research

Development and evaluation of an integrated liver nodule diagnostic method by combining the liver segment division and lesion localization/classification models for enhanced focal liver lesion detection
AbstractThe purpose of the study was to develop a liver nodule diagnostic method that accurately localizes and classifies focal liver lesions and identifies the specific liver segments in which they reside by integrating a liver segment division algorithm using a four-dimensional (4D) fully convolutional residual network (FC-ResNet) with a localization and classification model. We retrospectively collected data and divided 106 gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid-enhanced magnetic resonance examinations into Case-sets 1, 2, and 3. A liver segment division algorithm was developed using a 4D FC-ResNet ...
Source: Radiological Physics and Technology - November 2, 2023 Category: Physics Source Type: research

Simplified assessment for chemical exchanged saturation transfer (CEST) imaging: local offset frequency and CEST effect
AbstractThe aim of this study is to develop a novel phantom for the evaluation of clinical CEST imaging settings, e.g.,B0 andB1 field inhomogeneities, CEST contrast, and post-processing. We made a phantom composed of two slice sections: a grid section for local offset frequency evaluation and a sample section for CEST effect evaluation using different concentrations of an egg white albumin solution. On a 3 Tesla MR scanner, a phantom study was performed using CEST imaging; the meanB1 amplitudes were set at 1.2 and 1.9 µT, and CEST images with and withoutB0 corrections were acquired. Next, region of interest (ROI) anal...
Source: Radiological Physics and Technology - October 28, 2023 Category: Physics Source Type: research

Improving the depiction of small intracranial vessels in head computed tomography angiography: a comparative analysis of deep learning reconstruction and hybrid iterative reconstruction
In conclusion, DLR has the potential to improve visualization of small vessels. (Source: Radiological Physics and Technology)
Source: Radiological Physics and Technology - October 28, 2023 Category: Physics Source Type: research