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Ji X, Zhu G, Gou J, Chen S, Zhao W, Sun Z, Fu H, Wang H. A fully automatic deep learning-based method for segmenting regions of interest and predicting renal function in pediatric dynamic renal scintigraphy. Ann Nucl Med 2024; 38:382-390. [PMID: 38376629 DOI: 10.1007/s12149-024-01907-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 01/17/2024] [Indexed: 02/21/2024]
Abstract
OBJECTIVE Accurate delineation of renal regions of interest (ROIs) is critical for the assessment of renal function in pediatric dynamic renal scintigraphy (DRS). The purpose of this study was to develop and evaluate a deep learning (DL) model that can fully automatically delineate renal ROIs and calculate renal function in pediatric 99mTechnetium-ethylenedicysteine (99mTc-EC) DRS. METHODS This study retrospectively analyzed 1,283 pediatric DRS data at a single center from January to December 2018. These patients were divided into training set (n = 1027), validation set (n = 128), and testing set (n = 128). A fully automatic segmentation of ROIs (FASR) model was developed and evaluated. The pixel values of the automatically segmented ROIs were calculated to predict renal blood perfusion rate (BPR) and differential renal function (DRF). Precision, recall rate, intersection over union (IOU), and Dice similarity coefficient (DSC) were used to evaluate the performance of FASR model. Intraclass correlation (ICC) and Pearson correlation analysis were used to compare the consistency of automatic and manual method in assessing the renal function parameters in the testing set. RESULTS The FASR model achieved a precision of 0.88, recall rate of 0.94, IOU of 0.83, and DSC of 0.91. In the testing set, the r values of BPR and DRF calculated by the two methods were 0.94 (P < 0.01) and 0.97 (P < 0.01), and the ICCs (95% confidence interval CI) were 0.94 (0.90-0.96) and 0.94 (0.91-0.96). CONCLUSION We propose a reliable and stable DL model that can fully automatically segment ROIs and accurately predict renal function in pediatric 99mTc-EC DRS.
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Affiliation(s)
- Xueli Ji
- Department of Nuclear Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Guohui Zhu
- Institute of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200092, China
| | - Jinyu Gou
- Department of Nuclear Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Suyun Chen
- Department of Nuclear Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Wenyu Zhao
- Department of Nuclear Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Zhanquan Sun
- Institute of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200092, China.
| | - Hongliang Fu
- Department of Nuclear Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - Hui Wang
- Department of Nuclear Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
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Umeda IO, Koike Y, Ogata M, Kaneko E, Hamamichi S, Uehara T, Moribe K, Arano Y, Takahashi T, Fujii H. New liposome-radionuclide-chelate combination for tumor targeting and rapid healthy tissue clearance. J Control Release 2023; 361:847-855. [PMID: 37543291 DOI: 10.1016/j.jconrel.2023.07.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/19/2023] [Accepted: 07/31/2023] [Indexed: 08/07/2023]
Abstract
Radionuclide imaging and therapy are promising methods for controlling systemic cancers; however, their clinical application has been limited by excessive radionuclide accumulation in healthy tissues. To minimize radionuclide accumulation in non-cancerous tissues while ensuring sufficient build up in tumors, we aimed to develop a method that controlled the in vivo dynamics of radionuclides post-administration. To this end, we describe a novel strategy that combines liposomes, a potent carrier system for drug delivery, with unique radionuclide-ligand complexes based on 111In-ethylenedicysteine. Conventional 111In-ligand-complexes-carrying liposomes delivered substantial amounts of radionuclides to tumors; however, they also accumulated in the liver and spleen. In contrast, 111In-ethylenedicysteine-carrying liposomes greatly reduced non-specific accumulation, while being retained selectively at high doses within tumors. Liposomes were rapidly broken down in the liver, releasing encapsulated 111In-ligand complexes. Among the chelates used, only 111In-ethylenedicysteine could escape from the liver and be excreted in the urine. Instead, most liposomes remained intact in tumors, retaining the radionuclide-ligand complexes within them. Therefore, high tumor accumulation was obtained regardless of the type of 111In-ligand complexes in the liposomes. In vivo single photon emission computed tomography/computed tomography imaging with 111In-ethylenedicysteine-carrying liposomes accurately revealed tumor-selective radionuclide retention with little background. Hence, our new strategy could greatly enhance tumor-to-healthy tissue ratios, improve diagnostic imaging, boost therapeutic efficacy, reduce toxicity to healthy tissues, and facilitate radionuclide imaging and therapy.
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Affiliation(s)
- Izumi O Umeda
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan; Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8583, Japan; Kyoto College of Medical Science, 1-3, Imakita, Oyama-higashi, Sonobe, Nantan, Kyoto 622-0041, Japan.
| | - Yusuke Koike
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan; Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Cyuo-ku, Chiba, Chiba 260-8675, Japan
| | - Mayumi Ogata
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan; Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Cyuo-ku, Chiba, Chiba 260-8675, Japan
| | - Emi Kaneko
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Cyuo-ku, Chiba, Chiba 260-8675, Japan
| | - Shusei Hamamichi
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Tomoya Uehara
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Cyuo-ku, Chiba, Chiba 260-8675, Japan
| | - Kunikazu Moribe
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Cyuo-ku, Chiba, Chiba 260-8675, Japan
| | - Yasushi Arano
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Cyuo-ku, Chiba, Chiba 260-8675, Japan
| | - Tadayuki Takahashi
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
| | - Hirofumi Fujii
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
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Lin Q, Ni J, Li Y, Jin J, Zhu Y. Renal function damage in children with duplex kidneys. Int Urol Nephrol 2023; 55:1-8. [PMID: 36103043 PMCID: PMC9807503 DOI: 10.1007/s11255-022-03337-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/03/2022] [Indexed: 01/24/2023]
Abstract
PURPOSE To evaluate renal function damage in children with duplex kidneys. METHODS A total of 355 duplex kidneys, 110 urinary tract infection (UTI) kidneys without abnormalities, and 104 kidneys with primary unilateral vesicoureteral reflux (VUR) were reviewed. Clinical data including age at diagnosis, body weight, history of UTI, ureteroceles, ectopic ureteral opening, VUR grade, serum creatinine level, cystatin C level, renal scarring, split renal function in dimercaptosuccinic acid scans, and effective renal plasma flow (ERPF) were analyzed. RESULTS Duplex kidneys had a higher grade of VUR and renal scarring. Split renal function in unilateral duplex kidneys (45.58 ± 12.85%) was much lower than that in contralateral duplex kidneys (56.33 ± 11.90%) and controls (50.00 ± 11.38%) (P < 0.001 and P = 0.014, respectively). Both left and right split renal functions in bilateral duplex kidneys were similar to those ipsilateral to the controls (P = 0.906 and P = 0.932, respectively). However, the total ERPFs in the left, right, and bilateral duplex kidneys were significantly lower than that in the control group (P = 0.003, P = 0.001, and P = 0.003, respectively). The total ERPFs in the left and right unilateral duplex kidneys were similar. ERPF in unilateral duplex kidneys (106.70 ± 48.05 mL/min/m2) was significantly lower than that in contralateral duplex kidneys (150.18 ± 49.01 mL/min/m2) or those ipsilateral to controls (145.98 ± 41.16 mL/min/m2) (P < 0.001 and P < 0.001, respectively). CONCLUSION Duplex kidneys are usually accompanied by a higher grade of VUR, more severe renal scarring, and renal function impairment. Split renal function in duplex kidneys often declines significantly. Notably, the evaluation of split renal function in bilateral duplex kidneys should be performed cautiously.
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Affiliation(s)
- Qian Lin
- Pediatric College, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Jiajia Ni
- Department of Pediatric Nephrology, Rheumatology and Immunology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, No. 1665, Kongjiang Road, Yangpu District, Shanghai, 200092, China
| | - Yufeng Li
- Department of Pediatric Nephrology, Rheumatology and Immunology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, No. 1665, Kongjiang Road, Yangpu District, Shanghai, 200092, China.
| | - Jing Jin
- Department of Pediatric Nephrology, Rheumatology and Immunology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, No. 1665, Kongjiang Road, Yangpu District, Shanghai, 200092, China
| | - Yaju Zhu
- Department of Pediatric Nephrology, Rheumatology and Immunology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, No. 1665, Kongjiang Road, Yangpu District, Shanghai, 200092, China
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