Academic radiology · 2026
Feasibility of Using Short Repetition Time for Brain Tumors in 23Na-MRI.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Yamashita Koji, Obara Makoto, Kikuchi Kazufumi, Kuga Daisuke, Momosaka Daichi, Kusunoki Masaoki, Wada Tatsuhiro, Tokunaga Chiaki, Hatae Ryusuke, Fujioka Yutaka, Otsuji Ryosuke, Katsumata Yasutomo, Van Cauteren Marc, Yoshimoto Koji, Ishigami Kousei
Аннотация
RATIONALE AND OBJECTIVES: 23Na‑MR imaging requires lengthy acquisition times, it remains difficult to implement routinely in clinical workflows and limits broader clinical application. This study aimed to determine whether a TR of 60 ms (TR60) could maintain brain tumor conspicuity while reducing acquisition time compared to TR100.
MATERIALS AND METHODS: This prospective study includes adult patients with histopathologically confirmed supratentorial brain tumors. A 3 T scanner with a dual-tuned 1H/23Na birdcage head coil was used. A 3D radial stack-of-stars sequence was employed for the acquisition of 23Na-MR images. The lesion conspicuity on 23Na-MR images was evaluated using the contrast-to-noise ratio (CNR) and CNR efficiency (CNR/√ acquisition time; time-CNR), calculated by comparing the signal intensity of the tumor with that of the background. The CNR and time-CNR were then compared between TR60 and TR100 in detecting brain tumors.
RESULTS: A total of 30 patients (22 men) were enrolled. No significant differences were observed in the CNR between TR60 and TR100 (p = 0.56). The time-CNR of TR60 was significantly higher than that of TR100 (p < 0.001).
CONCLUSION: 23Na-MR imaging using TR60 achieved a significantly higher time-CNR than TR100 while maintaining comparable CNR, indicating improved acquisition efficiency for brain tumor evaluation.
MATERIALS AND METHODS: This prospective study includes adult patients with histopathologically confirmed supratentorial brain tumors. A 3 T scanner with a dual-tuned 1H/23Na birdcage head coil was used. A 3D radial stack-of-stars sequence was employed for the acquisition of 23Na-MR images. The lesion conspicuity on 23Na-MR images was evaluated using the contrast-to-noise ratio (CNR) and CNR efficiency (CNR/√ acquisition time; time-CNR), calculated by comparing the signal intensity of the tumor with that of the background. The CNR and time-CNR were then compared between TR60 and TR100 in detecting brain tumors.
RESULTS: A total of 30 patients (22 men) were enrolled. No significant differences were observed in the CNR between TR60 and TR100 (p = 0.56). The time-CNR of TR60 was significantly higher than that of TR100 (p < 0.001).
CONCLUSION: 23Na-MR imaging using TR60 achieved a significantly higher time-CNR than TR100 while maintaining comparable CNR, indicating improved acquisition efficiency for brain tumor evaluation.