Current Issue
May, 2026
- Vol. 30 No. 01
- Effect of Noise Reduction Filters in Extracardiac Accumulation Masking Processing on Defect Score and Left Ventricular Volume
Background: The extracardiac accumulation masking (MUS) method reduces artifacts from extracardiac accumulation by masking post-reconstruction and filtering. However, the impact of filter parameters on defect scores and cardiac function remains unclear. Thus, this study aimed to evaluate the effect of noise reduction filters in ......
- Oral Ga-67 Colonic Transit Scintigraphy in Patients with Chronic Constipation: A Single-Institution Experience in Taiwan
Introduction: Constipation is one of the common modern diseases today. Distinguishing between primary and secondary (organic) constipation is essential for appropriate treatment. In 1999, Dylan Bartholomeuse et al. conducted a comparative study of Ga-67 and In-111, finding that the results of both were very similar. This is good news ......
- Comparison of Cold Kit and Cassette-Based Automated Synthesis Methods for 68Ga-PSMA-11
Purpose: This study compared a cold kit protocol and a cassette-based automated system for routine synthesis of 68Ga-PSMA-11. Materials and Methods: We retrospectively analyzed 70 cold kit batches and 191 cassette-based batches. Synthesis time, decay-corrected radiochemical yield (RCY), coefficient of variation (CV), pH, radiochemical ......
- How a Metal Belt Turned Osteopenia into Osteoporosis
In Bone Mineral Density (BMD) assessment via Dual-energy X-ray Absorptiometry, the presence of external metallic artifacts is not merely a visual nuisance but a critical source of diagnostic error. This case highlights how a streak artifact from a patient's belt significantly altered the T-score, emphasizing the vital role of radiological ......
- Visual Stimulation–Induced Changes in Occipital Glucose Metabolism
18F-FDG Brain PET/CT is widely used to assess cerebral glucose metabolism. The occipital cortex is particularly sensitive to visual stimulation and may demonstrate altered metabolic activity depending on uptake conditions. Current guidelines recommend that patients remain awake with eyes open in a dark environment during the uptake phase ......
- User Experience and Learning Enhancement of a Nuclear Medicine Specialized GPTs Model
Purpose: This study aimed to develop a Generative Pre-trained Transformer-based model specialized in nuclear medicine education and patient guidance and to evaluate its effectiveness as a supplementary learning tool Materials and Methods: The specialized system was designed to provide tailored interactions for students and the general public ......
- How Auto-Segmentation Errors Turn Osteopenia into Pseudo-Osteoporosis: A Case of Tissue Area Loss and Neutral Zone Over-Subtraction
In dual-energy X-ray absorptiometry, accurate identification of the soft tissue area is essential for establishing baseline attenuation and ensuring precise bone mineral density measurement. This study analyzes a 75-year-old female patient who demonstrated an abrupt decline in femoral T-scores within one year. Daily quality assurance of the device ......
- Standardization of Pillow Height in Nuclear Medicine Imaging: Focus on Lesion Distortion
Purpose: Due to the lack of standardized manufacturer guidelines for pillow height in nuclear medicine, clinical practices often rely on empirical experience. This study evaluates the effect of head elevation on image quality and lesion distortion using an ACR (American College of Radiology) phantom to establish the optimal standardized height for ......
- Evaluation of the Usefulness of Quantitative Analysis Using Volume of Interest in SPECT/CT
Purpose: This study aims to evaluate the clinical utility and applicability of volume of interest based quantitative analysis by comparing region of interest based ejection fraction analysis in two dimensional planar imaging with volume of interest based quantitative analysis in three dimensional SPECT/CT. Materials and Methods: A 99mTcO4- solution ......
- Analysis of a Parenchymal Organ Volume-Based Dose Correction Model for 18F-FDG PET Radiopharmaceuticals
Purpose: Quantitative analysis and dose determination in 18F-FDG PET imaging are commonly based on total body weight; however, such approaches do not adequately account for individual differences in body composition, including fat and lean tissue proportions. This study aimed to propose and validate a radiopharmaceutical dose correction model based on ......