Effect of Noise Reduction Filters in Extracardiac Accumulation Masking Processing on Defect Score and Left Ventricular Volume
May , 2026

Mitsuha Fukami, Norikazu Matsutomo, Tomoaki Yamamoto

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 ......

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Oral Ga-67 Colonic Transit Scintigraphy in Patients with Chronic Constipation: A Single-Institution Experience in Taiwan
May , 2026

Wen-Wen Cheng, Kao-Yin Tu

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 ......

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Comparison of Cold Kit and Cassette-Based Automated Synthesis Methods for 68Ga-PSMA-11
May , 2026

Eun-Jin Cha, Yeon-Wook You, Ji-Na Kim, Jong-Woon Mun, Yun-Cheol Kim

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 ......

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How a Metal Belt Turned Osteopenia into Osteoporosis
May , 2026

Han-Kyung Seo

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 ......

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Visual Stimulation–Induced Changes in Occipital Glucose Metabolism
May , 2026

Young-Ran Woo, Jae-Kwang Ryu

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 ......

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User Experience and Learning Enhancement of a Nuclear Medicine Specialized GPTs Model
May , 2026

Hoon-Hee Park, Jin-Woo Jung, Jooyoung Lee

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 ......

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How Auto-Segmentation Errors Turn Osteopenia into Pseudo-Osteoporosis: A Case of Tissue Area Loss and Neutral Zone Over-Subtraction
May , 2026

Han-Kyung Seo

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 ......

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Standardization of Pillow Height in Nuclear Medicine Imaging: Focus on Lesion Distortion
May , 2026

Tae-Heon Kim, Jae-Kwang Ryu, Han-Ul Kim, Woo-Young Jung

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 ......

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