1.Planning evaluation of stereotactic magnetic resonance–guided online adaptive radiosurgery for kidney tumors close to the organ at risk: is it valuable to wait for good timing to perform stereotactic radiosurgery?
Takaya YAMAMOTO ; Shohei TANAKA ; Noriyoshi TAKAHASHI ; Rei UMEZAWA ; Yu SUZUKI ; Keita KISHIDA ; So OMATA ; Kazuya TAKEDA ; Hinako HARADA ; Kiyokazu SATO ; Yoshiyuki KATSUTA ; Noriyuki KADOYA ; Keiichi JINGU
Radiation Oncology Journal 2025;43(1):40-48
Purpose:
This study aimed to investigate changes in target coverage using magnetic resonance–guided online adaptive radiotherapy (MRgoART) for kidney tumors and to evaluate the suitable timing of treatment.
Materials and Methods:
Among patients treated with 3-fraction MRgoART for kidney cancer, 18 tumors located within 1 cm of the gastrointestinal tract were selected. Stereotactic radiosurgery planning with a prescription dose of 26 Gy was performed using pretreatment simulation and three MRgoART timings with an adapt-to-shape method. The best MRgoART plan was defined as the plan achieving the highest percentage of planning target volume (PTV) coverage of 26 Gy. In clinical scenario simulation, MRgoART plans were evaluated in the order of actual treatment. Waiting for the next timing was done when the PTV coverage of 26 Gy did not achieve 95%–99% or did not increase by 5% or more compared to the pretreatment plan.
Results:
The median percentages of PTV receiving 26 Gy in pretreatment and the first, second, and third MRgoART were 82% (range, 19%), 63% (range, 7% to 99%), 88% (range, 31% to 99%), and 95% (range, 3% to 99%), respectively. Comparing pretreatment simulation plans with the best MRgoART plans showed a significant difference (p = 0.025). In the clinical scenario simulation, 16 of the 18 planning series, including nine plans with 95%–99% PTV coverage of 26 Gy and seven plans with increased PTV coverage by 5% or more, would be irradiated at a good timing.
Conclusion
MRgoART revealed dose coverage differences at each MRgoART timing. Waiting for optimal irradiation timing could be an option in case of suboptimal timing.
2.Planning evaluation of stereotactic magnetic resonance–guided online adaptive radiosurgery for kidney tumors close to the organ at risk: is it valuable to wait for good timing to perform stereotactic radiosurgery?
Takaya YAMAMOTO ; Shohei TANAKA ; Noriyoshi TAKAHASHI ; Rei UMEZAWA ; Yu SUZUKI ; Keita KISHIDA ; So OMATA ; Kazuya TAKEDA ; Hinako HARADA ; Kiyokazu SATO ; Yoshiyuki KATSUTA ; Noriyuki KADOYA ; Keiichi JINGU
Radiation Oncology Journal 2025;43(1):40-48
Purpose:
This study aimed to investigate changes in target coverage using magnetic resonance–guided online adaptive radiotherapy (MRgoART) for kidney tumors and to evaluate the suitable timing of treatment.
Materials and Methods:
Among patients treated with 3-fraction MRgoART for kidney cancer, 18 tumors located within 1 cm of the gastrointestinal tract were selected. Stereotactic radiosurgery planning with a prescription dose of 26 Gy was performed using pretreatment simulation and three MRgoART timings with an adapt-to-shape method. The best MRgoART plan was defined as the plan achieving the highest percentage of planning target volume (PTV) coverage of 26 Gy. In clinical scenario simulation, MRgoART plans were evaluated in the order of actual treatment. Waiting for the next timing was done when the PTV coverage of 26 Gy did not achieve 95%–99% or did not increase by 5% or more compared to the pretreatment plan.
Results:
The median percentages of PTV receiving 26 Gy in pretreatment and the first, second, and third MRgoART were 82% (range, 19%), 63% (range, 7% to 99%), 88% (range, 31% to 99%), and 95% (range, 3% to 99%), respectively. Comparing pretreatment simulation plans with the best MRgoART plans showed a significant difference (p = 0.025). In the clinical scenario simulation, 16 of the 18 planning series, including nine plans with 95%–99% PTV coverage of 26 Gy and seven plans with increased PTV coverage by 5% or more, would be irradiated at a good timing.
Conclusion
MRgoART revealed dose coverage differences at each MRgoART timing. Waiting for optimal irradiation timing could be an option in case of suboptimal timing.
3.Planning evaluation of stereotactic magnetic resonance–guided online adaptive radiosurgery for kidney tumors close to the organ at risk: is it valuable to wait for good timing to perform stereotactic radiosurgery?
Takaya YAMAMOTO ; Shohei TANAKA ; Noriyoshi TAKAHASHI ; Rei UMEZAWA ; Yu SUZUKI ; Keita KISHIDA ; So OMATA ; Kazuya TAKEDA ; Hinako HARADA ; Kiyokazu SATO ; Yoshiyuki KATSUTA ; Noriyuki KADOYA ; Keiichi JINGU
Radiation Oncology Journal 2025;43(1):40-48
Purpose:
This study aimed to investigate changes in target coverage using magnetic resonance–guided online adaptive radiotherapy (MRgoART) for kidney tumors and to evaluate the suitable timing of treatment.
Materials and Methods:
Among patients treated with 3-fraction MRgoART for kidney cancer, 18 tumors located within 1 cm of the gastrointestinal tract were selected. Stereotactic radiosurgery planning with a prescription dose of 26 Gy was performed using pretreatment simulation and three MRgoART timings with an adapt-to-shape method. The best MRgoART plan was defined as the plan achieving the highest percentage of planning target volume (PTV) coverage of 26 Gy. In clinical scenario simulation, MRgoART plans were evaluated in the order of actual treatment. Waiting for the next timing was done when the PTV coverage of 26 Gy did not achieve 95%–99% or did not increase by 5% or more compared to the pretreatment plan.
Results:
The median percentages of PTV receiving 26 Gy in pretreatment and the first, second, and third MRgoART were 82% (range, 19%), 63% (range, 7% to 99%), 88% (range, 31% to 99%), and 95% (range, 3% to 99%), respectively. Comparing pretreatment simulation plans with the best MRgoART plans showed a significant difference (p = 0.025). In the clinical scenario simulation, 16 of the 18 planning series, including nine plans with 95%–99% PTV coverage of 26 Gy and seven plans with increased PTV coverage by 5% or more, would be irradiated at a good timing.
Conclusion
MRgoART revealed dose coverage differences at each MRgoART timing. Waiting for optimal irradiation timing could be an option in case of suboptimal timing.
4.Planning evaluation of stereotactic magnetic resonance–guided online adaptive radiosurgery for kidney tumors close to the organ at risk: is it valuable to wait for good timing to perform stereotactic radiosurgery?
Takaya YAMAMOTO ; Shohei TANAKA ; Noriyoshi TAKAHASHI ; Rei UMEZAWA ; Yu SUZUKI ; Keita KISHIDA ; So OMATA ; Kazuya TAKEDA ; Hinako HARADA ; Kiyokazu SATO ; Yoshiyuki KATSUTA ; Noriyuki KADOYA ; Keiichi JINGU
Radiation Oncology Journal 2025;43(1):40-48
Purpose:
This study aimed to investigate changes in target coverage using magnetic resonance–guided online adaptive radiotherapy (MRgoART) for kidney tumors and to evaluate the suitable timing of treatment.
Materials and Methods:
Among patients treated with 3-fraction MRgoART for kidney cancer, 18 tumors located within 1 cm of the gastrointestinal tract were selected. Stereotactic radiosurgery planning with a prescription dose of 26 Gy was performed using pretreatment simulation and three MRgoART timings with an adapt-to-shape method. The best MRgoART plan was defined as the plan achieving the highest percentage of planning target volume (PTV) coverage of 26 Gy. In clinical scenario simulation, MRgoART plans were evaluated in the order of actual treatment. Waiting for the next timing was done when the PTV coverage of 26 Gy did not achieve 95%–99% or did not increase by 5% or more compared to the pretreatment plan.
Results:
The median percentages of PTV receiving 26 Gy in pretreatment and the first, second, and third MRgoART were 82% (range, 19%), 63% (range, 7% to 99%), 88% (range, 31% to 99%), and 95% (range, 3% to 99%), respectively. Comparing pretreatment simulation plans with the best MRgoART plans showed a significant difference (p = 0.025). In the clinical scenario simulation, 16 of the 18 planning series, including nine plans with 95%–99% PTV coverage of 26 Gy and seven plans with increased PTV coverage by 5% or more, would be irradiated at a good timing.
Conclusion
MRgoART revealed dose coverage differences at each MRgoART timing. Waiting for optimal irradiation timing could be an option in case of suboptimal timing.
5.Planning evaluation of stereotactic magnetic resonance–guided online adaptive radiosurgery for kidney tumors close to the organ at risk: is it valuable to wait for good timing to perform stereotactic radiosurgery?
Takaya YAMAMOTO ; Shohei TANAKA ; Noriyoshi TAKAHASHI ; Rei UMEZAWA ; Yu SUZUKI ; Keita KISHIDA ; So OMATA ; Kazuya TAKEDA ; Hinako HARADA ; Kiyokazu SATO ; Yoshiyuki KATSUTA ; Noriyuki KADOYA ; Keiichi JINGU
Radiation Oncology Journal 2025;43(1):40-48
Purpose:
This study aimed to investigate changes in target coverage using magnetic resonance–guided online adaptive radiotherapy (MRgoART) for kidney tumors and to evaluate the suitable timing of treatment.
Materials and Methods:
Among patients treated with 3-fraction MRgoART for kidney cancer, 18 tumors located within 1 cm of the gastrointestinal tract were selected. Stereotactic radiosurgery planning with a prescription dose of 26 Gy was performed using pretreatment simulation and three MRgoART timings with an adapt-to-shape method. The best MRgoART plan was defined as the plan achieving the highest percentage of planning target volume (PTV) coverage of 26 Gy. In clinical scenario simulation, MRgoART plans were evaluated in the order of actual treatment. Waiting for the next timing was done when the PTV coverage of 26 Gy did not achieve 95%–99% or did not increase by 5% or more compared to the pretreatment plan.
Results:
The median percentages of PTV receiving 26 Gy in pretreatment and the first, second, and third MRgoART were 82% (range, 19%), 63% (range, 7% to 99%), 88% (range, 31% to 99%), and 95% (range, 3% to 99%), respectively. Comparing pretreatment simulation plans with the best MRgoART plans showed a significant difference (p = 0.025). In the clinical scenario simulation, 16 of the 18 planning series, including nine plans with 95%–99% PTV coverage of 26 Gy and seven plans with increased PTV coverage by 5% or more, would be irradiated at a good timing.
Conclusion
MRgoART revealed dose coverage differences at each MRgoART timing. Waiting for optimal irradiation timing could be an option in case of suboptimal timing.
6.Predicted functional analysis of rumen microbiota suggested the underlying mechanisms of the postpartum subacute ruminal acidosis in Holstein cows
Yoshiyuki TSUCHIYA ; Ena CHIBA ; Atsushi KIMURA ; Kenji KAWASHIMA ; Toshiya HASUNUMA ; Shiro KUSHIBIKI ; Yo-Han KIM ; Shigeru SATO
Journal of Veterinary Science 2023;24(2):e27-
Background:
The relationships between the postpartum subacute ruminal acidosis (SARA) occurrence and predicted bacterial functions during the periparturient period are still not clear in Holstein cows.
Objectives:
The present study was performed to investigate the alterations of rumen fermentation, bacterial community structure, and predicted bacterial functional pathways in Holstein cows.
Methods:
Holstein cows were divided into the SARA (n = 6) or non-SARA (n = 4) groups, depending on whether they developed SARA during the first 2 weeks after parturition.Reticulo-ruminal pH was measured continuously during the study period. Reticulo-ruminal fluid samples were collected 3 weeks prepartum, and 2 and 6 weeks postpartum, and blood samples were collected 3 weeks before, 0, 2, 4 and 6 weeks postpartum.
Results:
The postpartum decline in 7-day mean reticulo-ruminal pH was more severe and longer-lasting in the SARA group compared with the non-SARA group. Changes in predicted functional pathways were identified in the SARA group. A significant upregulation of pathway “PWY-6383” associated with Mycobacteriaceae species was identified at 3 weeks after parturition in the SARA group. Significantly identified pathways involved in denitrification (DENITRIFICATION-PWY and PWY-7084), detoxification of reactive oxygen and nitrogen species (PWY1G-0), and starch degradation (PWY-622) in the SARA group were downregulated.
Conclusions
The postpartum SARA occurrence is likely related to the predicted functions of rumen bacterial community rather than the alterations of rumen fermentation or fluid bacterial community structure. Therefore, our result suggests the underlying mechanisms, namely functional adaptation of bacterial community, causing postpartum SARA in Holstein cows during the periparturient period.
7.A Case of Redo Ascending Aortic Replacement for Anastomotic Pseudoaneurysm through Right Thoracotomy in a Patient with Severe Coagulation Disorder
Emi NAGATA ; Yoshiyuki SATO ; Koki TAKAHASHI
Japanese Journal of Cardiovascular Surgery 2022;51(3):163-166
A 51-year-old man presented to our hospital with general fatigue and lower extremity edema due to right heart failure with severe coagulation disorder. He had undergone ascending aortic and total arch replacement for type A acute aortic dissection when he was 49 years old and had diagnosed with anastomotic pseudoaneurysm in the ascending aorta by computed tomography 1 year after the operation. Preoperative computed tomography showed an enlargement of the pseudoaneurysm. Since re-median sternotomy seemed to be high risk strategy for bleeding due to severe coagulation disorder, we decided to perform ascending aortic replacement through right thoracotomy. We opened the pseudoaneurysm and found an aorto-right atrium fistula. Redo ascending aortic replacement with direct closure of the fistula was successfully performed. The postoperative course was uneventful.
8.Development of a Patient Registry System for Specialized Palliative Care Quality Assessment Using Patient-reported Outcomes: A Multicenter Pilot Study
Hideyuki HIRAYAMA ; Eriko SATOMI ; Yoshiyuki KIZAWA ; Mayuko MIYAZAKI ; Keita TAGAMI ; Ryuichi SEKINE ; Kozue SUZUKI ; Nobuyuki YOTANI ; Koji SUGANO ; Hirofumi ABO ; Meidai SAKASHITA ; Kazuki SATO ; Sari NAKAGAWA ; Yoko NAKAZAWA ; Jun HAMANO ; Mitsunori MIYASHITA
Palliative Care Research 2022;17(4):171-180
Objective: This study aimed to investigate the feasibility of a patient registry system for assessing PCT (palliative care team) by PRO (Patient-reported outcome) in Japan. Methods: We operated a patient registry system with electronic data collection at eight hospitals in 2021 in Japan. We consecutively included newly referred patients for a month and followed up with them for a month. IPOS or ESAS obtained as PRO at the start of the intervention, three days later, and every week after. The primary endpoint was the response rate to the symptom rating scale by patients and providers. Results: 318 patients were enrolled. The patient response rate was 59.1% at intervention and 37.0% after intervention, and the medical provider response rate was 98.4% at intervention and 70.3% after intervention. Interviews with PCT members indicated that participants required support to input PRO responses required support and paper questionnaire was better and that managing the survey date and overall management was burdensome. Discussion: Although only about half of the patients were able to respond to the PRO, this was the same level as in previous studies. The system and its operation method have many problems. We found that improvements such as reducing items and making the patient interviews paper-based are necessary to expand the system nationwide.
9.Successful Use of the Hybrid Assistive Limb for Care Support to Reduce Lumbar Load in a Simulated Patient Transfer
Kousei MIURA ; Hideki KADONE ; Tetsuya ABE ; Masao KODA ; Toru FUNAYAMA ; Hiroshi NOGUCHI ; Hiroshi KUMAGAI ; Katsuya NAGASHIMA ; Kentaro MATAKI ; Yosuke SHIBAO ; Kosuke SATO ; Hiroaki KAWAMOTO ; Yoshiyuki SANKAI ; Masashi YAMAZAKI
Asian Spine Journal 2021;15(1):40-45
Methods:
Nineteen volunteers (16 men, three women) lifted a 60-kg doll from a seated position to a standing position. The first transfer was performed without the HAL for Care Support, and the second was performed with the HAL for Care Support assistive robot. We evaluated transfer performance, the visual analog scale (VAS) score for lumbar fatigue, and electromyogram analyses of the trunk and hip.
Results:
Four participants (two men, two women) succeeded with the HAL for Care Support even though they were unable to perform the task without it. The mean lumbar fatigue VAS score for all participants without the HAL for Care Support was 62 mm, while that with it was 43 mm. With lumbar assistance from the HAL for Care Support, subjective lumbar fatigue during the transfer decreased significantly. A power analysis indicated adequate statistical power to detect a difference in the VAS score for lumbar fatigue (0.99). The activity of the left gluteus maximus alone increased significantly during transfers with the HAL for Care Support. No adverse events occurred during use of the HAL for Care Support for transfers.
Conclusions
The HAL for Care Support was able to reduce lumbar load in a simulated patient transfer.
10.Retrograde Type A Aortic Dissection after Thoracic Endovascular Aortic Repair in a Patient with Bovine Aortic Arch
Keiichi ISHIDA ; Hirono SATOKAWA ; Shinya TAKASE ; Yoshiyuki SATO ; Yuki SETO ; Takashi IGARASHI ; Akihiro YAMAMOTO ; Tsuyoshi FUJIMIYA ; Hitoshi YOKOYAMA
Japanese Journal of Cardiovascular Surgery 2019;48(5):341-344
Retrograde type A aortic dissection (RTAD) following thoracic endovascular aortic repair (TEVAR) is a lethal complication. A 54-year-old woman with bovine aortic arch presented with dilatation of the descending aorta due to chronic type B aortic dissection. She underwent TEVAR in zone 2 for closure of the entry site just below the origin of the left subclavian artery. On the day after TEAVR, she showed right hemiparesis, and was diagnosed with cerebral infarction on MRI and RTAD on CT. She underwent an emergent operation. The entry was at the proximal end of the bovine trunk, where the edge of the bare stent stuck out. We performed partial arch replacement with entry resection. Her postoperative course was uneventful. She was transferred to another hospital for rehabilitation 37 days after the surgery.


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