1.A novel method for determining dose distribution on panoramic reconstruction computed tomography images from radiotherapy computed tomography
Hiroyuki OKAMOTO ; Madoka SAKURAMACHI ; Wakako YATSUOKA ; Takao UENO ; Kouji KATSURA ; Naoya MURAKAMI ; Satoshi NAKAMURA ; Kotaro IIJIMA ; Takahito CHIBA ; Hiroki NAKAYAMA ; Yasunori SHUTO ; Yuki TAKANO ; Yuta KOBAYASHI ; Hironori KISHIDA ; Yuka URAGO ; Masato NISHITANI ; Shuka NISHINA ; Koushin ARAI ; Hiroshi IGAKI
Imaging Science in Dentistry 2024;54(2):129-137
Purpose:
Patients with head and neck cancer (HNC) who undergo dental procedures during radiotherapy (RT) face an increased risk of developing osteoradionecrosis (ORN). Accordingly, new tools must be developed to extract critical information regarding the dose delivered to the teeth and mandible. This article proposes a novel approach for visualizing 3-dimensional planned dose distributions on panoramic reconstruction computed tomography (pCT) images.
Materials and Methods:
Four patients with HNC who underwent volumetric modulated arc therapy were included. One patient experienced ORN and required the extraction of teeth after RT. In the study approach, the dental arch curve (DAC) was defined using an open-source platform. Subsequently, pCT images and dose distributions were generated based on the new coordinate system. All teeth and mandibles were delineated on both the original CT and pCT images. To evaluate the consistency of dose metrics, the Mann-Whitney U test and Student t-test were employed.
Results:
A total of 61 teeth and 4 mandibles were evaluated. The correlation coefficient between the 2 methods was 0.999, and no statistically significant difference was observed (P>0.05). This method facilitated a straightforward and intuitive understanding of the delivered dose. In 1 patient, ORN corresponded to the region of the root and the gum receiving a high dosage (approximately 70 Gy).
Conclusion
The proposed method particularly benefits dentists involved in the management of patients with HNC. It enables the visualization of a 3-dimensional dose distribution in the teeth and mandible on pCT, enhancing the understanding of the dose delivered during RT.
2.Utilization of and barriers to a telemedicine system at a rural general hospital in Japan: a mixed methods study
Takahiro HIRANO ; Tadashi KOBAYASHI ; Hiroki MAITA ; Takashi AKIMOTO ; Hiroyuki KATO
Journal of Rural Medicine 2023;18(4):226-232
Objective: The initial and operational costs of telemedicine are major barriers to its adoption. We aimed to investigate and identify the barriers to adopting a telemedicine system in a Japanese rural general hospital without incurring setup and operational costs.Materials and Methods: Our study was conducted between May and August 2018, and included six general practitioners working at a rural general hospital. We extracted data collected from messages (date and time, sender and recipient, and counts and contents of messages) and conducted semi-structured interviews, which were then analyzed using quantitative and qualitative methods.Results: We quantitatively analyzed the total counted of the 179 messages. The total counts recorded for each physician were 56 (A), 20 (B), 3 (C), 74 (D), 5 (E), and 21 (F). The mean monthly counts were 2.17 (May), 8.50 (June), 11.50 (July), and 7.67 (August). Interview data from the six physicians yielded 13 codes that included various points of dissatisfaction acting as barriers to using our system, which we grouped into mental and physical barriers. Mental barriers included suspicion of carrying, feelings of isolation, and loss, whereas physical barriers included portability, user authentication, internet speed, group chat system, notice, search image, typing, chat system, print facility, and limited function.Conclusion: The representative barriers to introducing a telemedicine system at a rural general hospital in Japan without initial and running costs could be classified as feelings of isolation and suspicion of carrying (mental barriers); and notice, portability, and user authentication (physical barriers). Continued investigation in this area is warranted, and solutions to these barriers could improve the shortage of medical staff in the context of declining birth rates and aging populations in Japan.
3.A Case of Cerebellar Cognitive Affective Syndrome(CCAS)with Aphasia due to Cerebellar Infarction Detected Using Arterial Spin Labeling (ASL)MRI
Tomohide SHIRASAKA ; Yasuhiro ITO ; Katsuhiko MARUICHI ; Hiroyuki KOBAYASHI ; Shunsuke TERASAKA
The Japanese Journal of Rehabilitation Medicine 2022;():21021-
Higher brain dysfunctions commonly interfere with functional reconstruction during rehabilitation. Most culprit lesions causing higher brain dysfunctions are observed in the cerebral cortex. However, recently, higher brain dysfunction caused by cerebellar lesions, termed cerebellar cognitive affective syndrome (CCAS), has attracted attention. Here, we report a case of CCAS in a patient with cerebellar infarction exhibiting aphasia, where arterial spin labeling (ASL) method of magnetic resonance imaging (MRI) was used to confirm decreased blood flow due to crossed cerebello-cerebral diaschisis (CCCD). The patient was a 5x years old, left-handed female. She was initially admitted to a neurosurgical hospital for dizziness. MRI demonstrated cerebellar infarction in the left posterior inferior cerebellar artery area. The next day, she was admitted to our hospital for surgery after the diagnosis of hemorrhagic cerebellar infarction due to progressive loss of consciousness. Craniotomy was performed to remove the hematoma. Neurological examination revealed fluent aphasia and ataxia in the left upper and lower extremities and trunk. ASL demonstrated decreased cerebral blood flow in the left cerebellar hemisphere and right front-temporal lobe. Therefore, we detected that CCCD resulted in higher brain dysfunction. After 3 months of inpatient rehabilitation, the patient's auditory comprehension, word conversion, and word recall improved. The patient was discharged unaided. This study used ASL to confirm the diagnosis and rehabilitation of the CCAS incidence effectively.
4.A Case of Cerebellar Cognitive Affective Syndrome(CCAS)with Aphasia due to Cerebellar Infarction Detected Using Arterial Spin Labeling (ASL)MRI
Tomohide SHIRASAKA ; Yasuhiro ITO ; Katsuhiko MARUICHI ; Hiroyuki KOBAYASHI ; Shunsuke TERASAKA
The Japanese Journal of Rehabilitation Medicine 2022;59(4):432-438
Higher brain dysfunctions commonly interfere with functional reconstruction during rehabilitation. Most culprit lesions causing higher brain dysfunctions are observed in the cerebral cortex. However, recently, higher brain dysfunction caused by cerebellar lesions, termed cerebellar cognitive affective syndrome (CCAS), has attracted attention. Here, we report a case of CCAS in a patient with cerebellar infarction exhibiting aphasia, where arterial spin labeling (ASL) method of magnetic resonance imaging (MRI) was used to confirm decreased blood flow due to crossed cerebello-cerebral diaschisis (CCCD). The patient was a 5x years old, left-handed female. She was initially admitted to a neurosurgical hospital for dizziness. MRI demonstrated cerebellar infarction in the left posterior inferior cerebellar artery area. The next day, she was admitted to our hospital for surgery after the diagnosis of hemorrhagic cerebellar infarction due to progressive loss of consciousness. Craniotomy was performed to remove the hematoma. Neurological examination revealed fluent aphasia and ataxia in the left upper and lower extremities and trunk. ASL demonstrated decreased cerebral blood flow in the left cerebellar hemisphere and right front-temporal lobe. Therefore, we detected that CCCD resulted in higher brain dysfunction. After 3 months of inpatient rehabilitation, the patient's auditory comprehension, word conversion, and word recall improved. The patient was discharged unaided. This study used ASL to confirm the diagnosis and rehabilitation of the CCAS incidence effectively.
5.Two Cases of Hair Loss Due to Long COVID Treated with Ninjin'yoeito
Yoshinao HARADA ; Mizue SAITA ; Yukiko FUKUI ; Mai SUZUKI ; Meiko TADOKORO ; Hiroyuki KOBAYASHI
Kampo Medicine 2022;73(3):342-346
Two cases of hair loss due to coronavirus disease 2019 (COVID-19) sequelae as known as Long COVID were successfully treated with ninjin’yoeito. Case 1 was a 45-year-old woman who complained of hair loss about 2 months after COVID-19 (moderate II in Japanese criteria). Case 2 was a 50-year-old woman who complained of hair loss about 2 months after COVID-19 (mild). In all cases, hair loss stopped next month after treatment with ninjin’yoeito. And their hair began to grow 2 months later administration, the depression caused by hair loss improved as the symptoms improved. Hair loss is one of the symptoms with blood [TM1] deficiency, and patients suffering from Long COVID are also with qi deficiency. We gave ninjinʼyoeito for pattern of both qi and blood [TM1] deficiency with reference to traditional key of treatment, and it contributed to the improvement of symptoms.
6.Successful treatment of ischemic stroke associated with brachiocephalic artery stenosis using alteplase
Yuta MITANI ; Zen KOBAYASHI ; Eijiro HATTORI ; Yoshiyuki NUMASAWA ; Shoichiro ISHIHARA ; Hiroyuki TOMIMITSU ; Shuzo SHINTANI
Journal of Rural Medicine 2021;16(2):123-125
Introduction: Brachiocephalic artery stenosis rarely causes right hemispheric infarction with associated left hemiparesis. To date, there have been no reported cases of stroke associated with brachiocephalic artery stenosis that were successfully treated with recombinant tissue-type plasminogen activator (rt-PA), alteplase.Case Report: An 80-year-old woman presented with left hemiparesis. Brain computed tomography showed no hemorrhage, and computed tomography angiography demonstrated brachiocephalic artery stenosis. Alteplase was administered based on a diagnosis of ischemic stroke. Brain magnetic resonance imaging showed multiple acute infarctions. Thereafter, the blood pressure of the right arm was found to be lower than that of the left arm. The patient’s neurological deficits gradually improved; she was eventually able to walk again and was thus discharged home.Conclusion: While the combination of left hemiparesis and a decrease in blood pressure in the right arm are well known in patients with stroke associated with Stanford type A aortic dissections, it may also occur in patients with stroke due to brachiocephalic artery stenosis. Unlike stroke associated with Stanford type A aortic dissections, stroke due to brachiocephalic artery stenosis may be treated with alteplase.
7.Olaparib plus bevacizumab as maintenance therapy in patients with newly diagnosed, advanced ovarian cancer: Japan subset from the PAOLA-1/ENGOT-ov25 trial
Keiichi FUJIWARA ; Hiroyuki FUJIWARA ; Hiroyuki YOSHIDA ; Toyomi SATOH ; Kan YONEMORI ; Shoji NAGAO ; Takashi MATSUMOTO ; Hiroaki KOBAYASHI ; Hughes BOURGEOIS ; Philipp HARTER ; Anna Maria MOSCONI ; Isabel Palacio VAZQUEZ ; Alexander REINTHALLER ; Tomoko FUJITA ; Philip ROWE ; Eric PUJADE-LAURAINE ; Isabelle RAY-COQUARD
Journal of Gynecologic Oncology 2021;32(5):e82-
Objective:
The addition of maintenance olaparib to bevacizumab demonstrated a significant progression-free survival (PFS) benefit in patients with newly diagnosed, advanced ovarian cancer in the PAOLA-1/ENGOT-ov25 trial (NCT02477644). We evaluated maintenance olaparib plus bevacizumab in the Japan subset of PAOLA-1.
Methods:
PAOLA-1 was a randomized, double-blind, phase III trial. Patients received maintenance olaparib tablets 300 mg twice daily or placebo twice daily for up to 24 months, plus bevacizumab 15 mg/kg every 3 weeks for up to 15 months in total. This prespecified subgroup analysis evaluated investigator-assessed PFS (primary endpoint).
Results:
Of 24 randomized Japanese patients, 15 were assigned to olaparib and 9 to placebo. After a median follow-up for PFS of 27.7 months for olaparib plus bevacizumab and 24.0 months for placebo plus bevacizumab, median PFS was 27.4 versus 19.4 months, respectively (hazard ratio [HR]=0.34; 95% confidence interval [CI]=0.11–1.00). In patients with tumors positive for homologous recombination deficiency, the HR for PFS was 0.57 (95% CI=0.16–2.09). Adverse events in the Japan subset were generally consistent with those of the PAOLA-1 overall population and with the established safety and tolerability profiles of olaparib and bevacizumab.
Conclusion:
Results
in the Japan subset of PAOLA-1 support the overall conclusion of the PAOLA-1 trial demonstrating that the addition of maintenance olaparib to bevacizumab provides a PFS benefit in patients with newly diagnosed, advanced ovarian cancer.
8.Remote cardiac rehabilitation is a good alternative of outpatient cardiac rehabilitation in the COVID-19 era.
Atsuko NAKAYAMA ; Naoko TAKAYAMA ; Momoko KOBAYASHI ; Kanako HYODO ; Naomi MAESHIMA ; Fujiwara TAKAYUKI ; Hiroyuki MORITA ; Issei KOMURO
Environmental Health and Preventive Medicine 2020;25(1):48-48
BACKGROUND:
In the wake of the coronavirus disease 2019 (COVID-19) pandemic, people need to practice social distancing in order to protect themselves from SARS-CoV-2 infection. In such stressful situations, remote cardiac rehabilitation (CR) might be a viable alternative to the outpatient CR program.
METHODS:
We prospectively investigated patients hospitalized for heart failure (HF) with a left ventricular ejection fraction of < 50%. As for patients who participated in the remote CR program, telephone support was provided by cardiologists and nurses who specialized in HF every 2 weeks after discharge. The emergency readmission rate within 30 days of discharge was compared among the outpatient CR, remote CR, and non-CR groups, and the EQ-5D score was compared between the outpatient CR and remote CR groups.
RESULTS:
The participation rate of HF patients in our remote CR program elevated during the COVID-19 pandemic. As observed in the outpatient CR group (n = 69), the emergency readmission rate within 30 days of discharge was lower in the remote CR group (n = 30) than in the non-CR group (n = 137) (P = 0.02). The EQ-5D score was higher in the remote CR group than in the outpatient CR group (P = 0.03) 30 days after discharge.
CONCLUSIONS
Remote CR is as effective as outpatient CR for improving the short-term prognosis of patients hospitalized for heart failure post-discharge. This suggests that the remote CR program can be provided as a good alternative to the outpatient CR program.
Aged
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Betacoronavirus
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Cardiac Rehabilitation
;
methods
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Coronavirus Infections
;
epidemiology
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Heart Failure
;
rehabilitation
;
Humans
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Japan
;
Middle Aged
;
Monitoring, Ambulatory
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Pandemics
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Pneumonia, Viral
;
epidemiology
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Prospective Studies
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Self Care
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Telemedicine
;
methods
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Telephone
9.Japan Society of Gynecologic Oncology 2018 guidelines for treatment of uterine body neoplasms
Wataru YAMAGAMI ; Mikio MIKAMI ; Satoru NAGASE ; Tsutomu TABATA ; Yoichi KOBAYASHI ; Masanori KANEUCHI ; Hiroaki KOBAYASHI ; Hidekazu YAMADA ; Kiyoshi HASEGAWA ; Hiroyuki FUJIWARA ; Hidetaka KATABUCHI ; Daisuke AOKI
Journal of Gynecologic Oncology 2020;31(1):18-
10.Serial Changes in Score on the Japanese Version of the Trail Making Test (TMT-J) After Minor Ischemic Stroke
Miho YOSHIOKA ; Zen KOBAYASHI ; Kaori KATO ; Keisuke INOUE ; Masaki HAKOMORI ; Kazunori TOYODA ; Yoshiyuki NUMASAWA ; Toshiya MATSUDA ; Yuki KATAYAMA ; Shoichiro ISHIHARA ; Hiroyuki TOMIMITSU ; Shuzo SHINTANI
Journal of the Japanese Association of Rural Medicine 2020;69(4):351-
The Trail Making Test (TMT) is a widely used measure of attention impairment. The time needed to complete the TMT (TMT score) is longer with greater impairment of attention in patients with brain diseases. TMT score becomes large in a proportion of patients with minor ischemic stroke. The Japanese version of the TMT- (TMT-J) was published in 2019. The purpose of this study was to clarify serial changes in TMT-J scores in patients with minor ischemic stroke. We retrospectively reviewed the TMT-J scores in those patients who completed the test both 8-14 days and 29-35 days after stroke onset. On initial evaluation, 1 of 21 patients could not complete TMT-J Part A. TMT-J Part A scores had a mean of 67 s and were abnormally large in 45% of the 20 patients who completed this part. Two of these 20 patients could not complete TMT-J Part B. TMT-J Part B scores had a mean of 135 s and were abnormally large in 61% of the 18 patients who completed this part. On second evaluation, scores on Part A and Part B improved in 76% and 73% of patients, respectively. This study demonstrated that abnormal TMT-J scores 8-14 days after onset of minor ischemic stroke improved over time in most patients.


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