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Yamaguchi M, Kojo K, Akatsuka M, Haishi T, Kobayashi T, Nakajima T, Nishiyama H, Fujii H. High Resolution MR Imaging of the Testis Using a Small Radiofrequency Coil. Magn Reson Med Sci 2022; 22:127-136. [PMID: 35321985 PMCID: PMC9849421 DOI: 10.2463/mrms.tn.2021-0130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
We have developed a new device, consisting of a 3-cm RF coil and an immobilizer, to acquire high-resolution MR images of the testis. With the approval of our institutional review board, we conducted an MRI study on a cohort of healthy volunteers to test this device. With the participants in the supine position, we placed the dedicated immobilizer and RF coil on the scrotum for typically no more than 3 min. Subsequently, T2-weighted images were acquired with an in-plane resolution of 117 µm using a 3-T MR scanner and the periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) sequence. The total scan time ranged from 12 to 30 min (average 20 min). High-resolution MR images of the testis were acquired without deterioration by motion artifacts. Our results showed that the combined use of a small RF coil and an immobilizer is a feasible option for acquiring high-resolution MR images of the testis.
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Affiliation(s)
- Masayuki Yamaguchi
- Division of Functional Imaging, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan,Corresponding author: Division of Functional Imaging, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan. Phone/Fax: +81-4-7134-6832, E-mail:
| | - Kosuke Kojo
- Division of Functional Imaging, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan,Department of Urology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Mizuki Akatsuka
- Division of Functional Imaging, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan
| | - Tomoyuki Haishi
- Division of Functional Imaging, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan,MR Technology, Inc., Tsukuba, Ibaraki, Japan,Department of Radiological Sciences, School of Health Sciences, International University of Health and Welfare, Narita, Chiba, Japan
| | - Tatsushi Kobayashi
- Department of Diagnostic Radiology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Takahito Nakajima
- Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hiroyuki Nishiyama
- Department of Urology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hirofumi Fujii
- Division of Functional Imaging, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan,Department of Diagnostic Radiology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
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Abstract
Techniques for testis immobilization can facilitate high-resolution MR imaging applications for testicular diseases by assuring good positioning of the testis on small radiofrequency coils and reducing motion artifacts. We tested negative pressure suction to immobilize the testis of rats during MR image acquisitions. Suction pressure between -5 and -10 kPa assured good positioning, suppressed motion artifacts, and allowed the observation of blood vessels and seminiferous tubules.
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Affiliation(s)
- Masayuki Yamaguchi
- Division of Functional Imaging, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center
| | - Hirofumi Fujii
- Division of Functional Imaging, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center
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