Evaluation of radiation dose reduction in head CT using the half-dose method
ConclusionThe HDM yielded diagnostically acceptable images. In addition, a change in protocol for only two diseases successfully reduced the patients ’ overall radiation exposure by approximately 15%. Introducing and optimizing the HDM for frequently performed target diseases will be useful in reducing the exposure dose for the hospital’s patient population. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Follow-up Tc-99 m pyrophosphate cardiac scan for patients with transthyretin cardiac amyloidosis treated with tafamidis
ConclusionA decrease in H/CL ratio was found after tafamidis therapy in patients with ATTR-CA, albeit the magnitude of changes in the H/CL ratio ( ΔH/CL ratio) was not significantly different from that of patients without tafamidis therapy. Future study with larger population might be required to further clarify the effect of tafamidis therapy on myocardial uptake of Tc-99 m PYP.Clinical trial registrationNo clinical trial was conducted in our retrospective study. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Imaging of pituitary tumors: an update with the 5th WHO Classifications —part 1. Pituitary neuroendocrine tumor (PitNET)/pituitary adenoma
AbstractThe pituitary gland is the body ’s master gland of the endocrine glands. Although it is a small organ, many types of tumors can develop within it. The recently revised fifth edition of the World Health Organization (WHO) classifications (2021 World Health Organization Classification of Central Nervous System Tumors and 2022 Worl d Health Organization Classification of Endocrine and Neuroendocrine Tumors) revealed significant changes to the classification of pituitary adenomas, the most common type of pituitary gland tumor. This change categorized pituitary adenomas as neuroendocrine tumors and proposed the name t...
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Deep learning reconstruction with single-energy metal artifact reduction in pelvic computed tomography for patients with metal hip prostheses
ConclusionDLR-S provided better pelvic CT images in patients with metal hip prostheses than IR-S and DLR. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Imaging of pituitary tumors: an update with the 5th WHO Classifications —part 2. Neoplasms other than PitNET and tumor-mimicking lesions
AbstractMany types of tumors can develop in the pituitary gland. In the recently revised 5th editions of the World Health Organization (WHO) classifications (2021 WHO Classification of Central Nervous System Tumors and the 2022 WHO Classification of Endocrine and Neuroendocrine Tumors), various changes have been made to the tumors other than pituitary neuroendocrine tumor (PitNET)/pituitary adenoma, as well as PitNET. Adamantinomatous craniopharyngioma and papillary craniopharyngioma are now considered separate tumors in the 5th edition of the WHO classification. Tumors positive for thyroid transcription factor 1, a marker...
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Four-dimensional quantitative analysis using FDG-PET in clinical oncology
AbstractPositron emission tomography (PET) with F-18 fluorodeoxyglucose (FDG) has been commonly used in many oncological areas. High-resolution PET permits a three-dimensional analysis of FDG distributions on various lesions in vivo, which can be applied for tissue characterization, risk analysis, and treatment monitoring after chemoradiotherapy and immunotherapy. Metabolic changes can be assessed using the tumor absolute FDG uptake as standardized uptake value (SUV) and metabolic tumor volume (MTV). In addition, tumor heterogeneity assessment can potentially estimate tumor aggressiveness and resistance to chemoradiotherap...
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Utility of flow diverters in treatment of acutely ruptured uncoilable aneurysms of the posterior circulation of the brain
ConclusionThe procedure-related morbidity and mortality is not negligible. However, the risks and efficacy associated with FDs are acceptable, especially when adjunctive coiling is possible, given the lack of treatment alternatives. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Left atrial strain assessment using cardiac computed tomography in patients with hypertrophic cardiomyopathy
ConclusionCT-derived LA strain is feasible for quantitative assessment of left atrial function in patients with HCM. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
From pituitary adenoma to PitNET: it is time to discuss PitNET/pituitary adenoma
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Radiologist expertise and responsibilities for off-label use of Urografin before the change in indication by medical health insurance
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Correction to: Imaging of pituitary tumors: an update with the 5th WHO Classifications —part 1. Pituitary neuroendocrine tumor (PitNET)/pituitary adenoma
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Correction to: Imaging of pituitary tumors: an update with the 5th WHO Classifications —part 2. Neoplasms other than PitNET and tumor-mimicking lesions
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Effectiveness of deep learning reconstruction on standard to ultra-low-dose high-definition chest CT images
ConclusionDLR is potentially more effective for image quality improvement and lung texture evaluation than hybrid-type IR on all radiation dose CTs obtained at HDCT and reconstructed with each section thickness with both matrixes for patients with a variety of pulmonary diseases. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - July 27, 2023 Category: Radiology Source Type: research
Fetal MRI of the supratentorial brain abnormalities: what we should know about ventriculomegaly?
AbstractFetal MRI is performed to evaluate the brain in cases where an abnormality is detected by ultrasonography (US). Fetal MRI has higher contrast resolution than US. Because the fetal brain is dynamic structure, it is important to know the normal appearance of the brain at different gestational age to be better able to identify abnormalities using MRI. Fast imaging sequences to minimize artifact from fetal motion are required. The main sequences used are ultrafast T2 weighted imaging. Similar to pediatric neuroimaging, images are acquired in the axial, sagittal, and coronal planes. T1 weighted image and Gradient echo-p...
Source: Japanese Journal of Radiology - July 26, 2023 Category: Radiology Source Type: research
