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Shang D, Duan J, Yin Y, Wang R. Impact of different respiratory gating methods on target delineation and a radiotherapy plan for solitary pulmonary tumors. Cancer Med 2024; 13:e7322. [PMID: 38785309 PMCID: PMC11117447 DOI: 10.1002/cam4.7322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 04/07/2024] [Accepted: 05/12/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND AND PURPOSE Respiratory movement has an important impact on the radiotherapy for lung tumor. Respiratory gating technology is helpful to improve the accuracy of target delineation. This study investigated the value of prospective and retrospective respiratory gating simulations in target delineation and radiotherapy plan design for solitary pulmonary tumors (SPTs) in radiotherapy. METHODS The enrolled patients underwent CT simulation with three-dimensional (3D) CT non gating, prospective respiratory gating, and retrospective respiratory gating simulation. The target volumes were delineated on three sets of CT images, and radiotherapy plans were prepared accordingly. Tumor displacements and movement information obtained using the two respiratory gating approaches, as well as the target volumes and dosimetry parameters in the radiotherapy plan were compared. RESULTS No significant difference was observed in tumor displacement measured using the two gating methods (p > 0.05). However, the internal gross tumor volumes (IGTVs), internal target volumes (ITVs), and planning target volumes (PTVs) based on the retrospective respiratory gating simulation were larger than those obtained using prospective gating (group A: pIGTV = 0.041, pITV = 0.003, pPTV = 0.008; group B: pIGTV = 0.025, pITV = 0.039, pPTV = 0.004). The two-gating PTVs were both smaller than those delineated on 3D non gating images (p < 0.001). V5Gy, V10Gy, V20Gy, V30Gy, and mean lung dose in the two gated radiotherapy plans were lower than those in the 3D non gating plan (p < 0.001); however, no significant difference was observed between the two gating plans (p > 0.05). CONCLUSIONS The application of respiratory gating could reduce the target volume and the radiation dose that the normal lung tissue received. Compared to prospective respiratory gating, the retrospective gating provides more information about tumor movement in PTV.
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Affiliation(s)
- Dongping Shang
- Department of Radiation OncologyShandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Jinghao Duan
- Department of Radiation OncologyShandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Yong Yin
- Department of Radiation OncologyShandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical SciencesJinanChina
| | - Ruozheng Wang
- Department of Radiation OncologyAffiliated Tumor Hospital of Xinjiang Medical UniversityUrumqiChina
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Otake S, Shiraishi Y, Chubachi S, Tanabe N, Maetani T, Asakura T, Namkoong H, Shimada T, Azekawa S, Nakagawara K, Tanaka H, Fukushima T, Watase M, Terai H, Sasaki M, Ueda S, Kato Y, Harada N, Suzuki S, Yoshida S, Tateno H, Yamada Y, Jinzaki M, Hirai T, Okada Y, Koike R, Ishii M, Hasegawa N, Kimura A, Imoto S, Miyano S, Ogawa S, Kanai T, Fukunaga K. Lung volume measurement using chest CT in COVID-19 patients: a cohort study in Japan. BMJ Open Respir Res 2024; 11:e002234. [PMID: 38663888 PMCID: PMC11043761 DOI: 10.1136/bmjresp-2023-002234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
OBJECTIVE This study aimed to investigate the utility of CT quantification of lung volume for predicting critical outcomes in COVID-19 patients. METHODS This retrospective cohort study included 1200 hospitalised patients with COVID-19 from 4 hospitals. Lung fields were extracted using artificial intelligence-based segmentation, and the percentage of the predicted (%pred) total lung volume (TLC (%pred)) was calculated. The incidence of critical outcomes and posthospitalisation complications was compared between patients with low and high CT lung volumes classified based on the median percentage of predicted TLCct (n=600 for each). Prognostic factors for residual lung volume loss were investigated in 208 patients with COVID-19 via a follow-up CT after 3 months. RESULTS The incidence of critical outcomes was higher in the low TLCct (%pred) group than in the high TLCct (%pred) group (14.2% vs 3.3%, p<0.0001). Multivariable analysis of previously reported factors (age, sex, body mass index and comorbidities) demonstrated that CT-derived lung volume was significantly associated with critical outcomes. The low TLCct (%pred) group exhibited a higher incidence of bacterial infection, heart failure, thromboembolism, liver dysfunction and renal dysfunction than the high TLCct (%pred) group. TLCct (%pred) at 3 months was similarly divided into two groups at the median (71.8%). Among patients with follow-up CT scans, lung volumes showed a recovery trend from the time of admission to 3 months but remained lower in critical cases at 3 months. CONCLUSION Lower CT lung volume was associated with critical outcomes, posthospitalisation complications and slower improvement of clinical conditions in COVID-19 patients.
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Affiliation(s)
- Shiro Otake
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Yusuke Shiraishi
- Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shotaro Chubachi
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Naoya Tanabe
- Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Tomoki Maetani
- Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takanori Asakura
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Ho Namkoong
- Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Takashi Shimada
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Shuhei Azekawa
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Kensuke Nakagawara
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Hiromu Tanaka
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Takahiro Fukushima
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Mayuko Watase
- Department of Respiratory Medicine, National Hospital Organization Tokyo Medical Centre, Tokyo, Japan
| | - Hideki Terai
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Mamoru Sasaki
- Department of Internal Medicine, Saitama Medical Center, Tokyo, Japan
| | - Soichiro Ueda
- Department of Internal Medicine, Saitama Medical Center, Tokyo, Japan
| | - Yukari Kato
- Division of Respiratory Medicine, Juntendo University School of Medicine Graduate School of Medicine, Bunkyo-ku, Japan
| | - Norihiro Harada
- Division of Respiratory Medicine, Juntendo University School of Medicine Graduate School of Medicine, Bunkyo-ku, Japan
| | - Shoji Suzuki
- Department of Pulmonary Medicine, Saitama City Hospital, Saitama, Japan
| | - Shuichi Yoshida
- Department of Pulmonary Medicine, Saitama City Hospital, Saitama, Japan
| | - Hiroki Tateno
- Department of Pulmonary Medicine, Saitama City Hospital, Saitama, Japan
| | - Yoshitake Yamada
- Keio University Department of Radiology, Shinjuku-ku, Tokyo, Japan
| | - Masahiro Jinzaki
- Keio University Department of Radiology, Shinjuku-ku, Tokyo, Japan
| | - Toyohiro Hirai
- Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yukinori Okada
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, Japan
- Department of Genome Informatics, The University of Tokyo Graduate School of Medicine Faculty of Medicine, Bunkyo-ku, Japan
| | - Ryuji Koike
- Department of Pharmacovigilance, Tokyo Medical and Dental University, Tokyo, Japan
| | - Makoto Ishii
- Faculty of Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Naoki Hasegawa
- Center for Infectious Diseases and Infection Control, Keio University, School of Medicine, Tokyo, Japan
| | - Akinori Kimura
- Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Satoru Miyano
- Tokyo Medical and Dental University, Bunkyo-ku, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Kyoto University Graduate School of Medicine Faculty of Medicine, Kyoto, Japan
- Department of Medicine, Regenerative Medicine Karolinska Institute, Stockholm, Sweden
| | - Takanori Kanai
- Division of Gastroenterology and Hepatology Department of Internal Medicine, Keio University School of Medicine, Shinjuku-ku, Japan
| | - Koichi Fukunaga
- ivision of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
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Hu S, Lu R, Zhu Y, Zhu W, Jiang H, Bi S. Application of Medical Image Navigation Technology in Minimally Invasive Puncture Robot. SENSORS (BASEL, SWITZERLAND) 2023; 23:7196. [PMID: 37631733 PMCID: PMC10459274 DOI: 10.3390/s23167196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/11/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023]
Abstract
Microneedle puncture is a standard minimally invasive treatment and surgical method, which is widely used in extracting blood, tissues, and their secretions for pathological examination, needle-puncture-directed drug therapy, local anaesthesia, microwave ablation needle therapy, radiotherapy, and other procedures. The use of robots for microneedle puncture has become a worldwide research hotspot, and medical imaging navigation technology plays an essential role in preoperative robotic puncture path planning, intraoperative assisted puncture, and surgical efficacy detection. This paper introduces medical imaging technology and minimally invasive puncture robots, reviews the current status of research on the application of medical imaging navigation technology in minimally invasive puncture robots, and points out its future development trends and challenges.
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Affiliation(s)
| | - Rongjian Lu
- School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China; (S.H.)
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Polizzi M, Kim S, Rosu-Bubulac M. A comprehensive quality assurance procedure for 4D CT commissioning and periodic QA. J Appl Clin Med Phys 2022; 23:e13764. [PMID: 36057944 DOI: 10.1002/acm2.13764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/21/2022] [Accepted: 08/04/2022] [Indexed: 11/11/2022] Open
Abstract
PURPOSE The 4D computed tomography (CT) simulation is an essential procedure for tumors exhibiting breathing-induced motion. However, to date there are no established guidelines to assess the characteristics of existing systems and to describe meaningful performance. We propose a commissioning quality assurance (QA) protocol consisting of measurements and acquisitions that assess the mechanical and computational operation for 4D CT with both phase and amplitude-based reconstructions, for regular and irregular respiratory patterns. METHODS The 4D CT scans of a QUASAR motion phantom were acquired for both regular and irregular breathing patterns. The hardware consisted of the Canon Aquilion Exceed LB CT scanner used in conjunction with the Anzai laser motion monitoring system. The nominal machine performance and reconstruction were demonstrated with measurements using regular breathing patterns. For irregular breathing patterns the performance was quantified through the analysis of the target motion in the superior and inferior directions, and the volume of the internal target volume (ITV). Acquisitions were performed using multiple pitches and the reconstructions were performed using both phase and amplitude-based binning. RESULTS The target was accurately captured during regular breathing. For the irregular breathing, the measured ITV exceeded the nominal ITV parameters in all scenarios, but all deviations were less than the reconstructed slice thickness. The mismatch between the nominal pitch and the actual breathing rate did not affect markedly the size of the ITV. Phase and normalized amplitude binning performed similarly. CONCLUSIONS We demonstrated a framework for measuring and quantifying the initial performance of 4D CT simulation scans that can also be applied during periodic QAs. The regular breathing provided confidence that the hardware and the software between the systems performs adequately. The irregular breathing data suggest that the system may be expected to capture in excess the target motion and geometry, but the deviation is expected to be within the slice thickness.
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Affiliation(s)
- Mitchell Polizzi
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Siyong Kim
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Mihaela Rosu-Bubulac
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia, USA
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Quality assurance of a breathing controlled four-dimensional computed tomography algorithm. Phys Imaging Radiat Oncol 2022; 23:85-91. [PMID: 35844256 PMCID: PMC9283927 DOI: 10.1016/j.phro.2022.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 06/01/2022] [Accepted: 06/20/2022] [Indexed: 11/21/2022] Open
Abstract
Initial quality assurance of a novel breathing-controlled four-dimensional computed tomography algorithm. Assessment of geometry, motion representation and image quality for regular and irregular breathing. No clinically relevant differences in results for regular and irregular breathing. Only minor differences in tumor geometry representation and image quality compared to static three-dimensional computed tomography. Table flexion has no clinically relevant impact on geometry representation.
Background & purpose Material & methods Results Conclusions
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Tajik M, Akhlaqi MM, Gholami S. Advances in anthropomorphic thorax phantoms for radiotherapy: a review. Biomed Phys Eng Express 2021; 8. [PMID: 34736235 DOI: 10.1088/2057-1976/ac369c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 11/04/2021] [Indexed: 11/12/2022]
Abstract
A phantom is a highly specialized device, which mimic human body, or a part of it. There are three categories of phantoms: physical phantoms, physiological phantoms, and computational phantoms. The phantoms have been utilized in medical imaging and radiotherapy for numerous applications. In radiotherapy, the phantoms may be used for various applications such as quality assurance (QA), dosimetry, end-to-end testing, etc. In thoracic radiotherapy, unique QA problems including tumor motion, thorax deformation, and heterogeneities in the beam path have complicated the delivery of dose to both tumor and organ at risks (OARs). Also, respiratory motion is a major challenge in radiotherapy of thoracic malignancies, which can be resulted in the discrepancies between the planned and delivered doses to cancerous tissue. Hence, the overall treatment procedure needs to be verified. Anthropomorphic thorax phantoms, which are made of human tissue-mimicking materials, can be utilized to obtain the ground truth to validate these processes. Accordingly, research into new anthropomorphic thorax phantoms has accelerated. Therefore, the review is intended to summarize the current status of the commercially available and in-house-built anthropomorphic physical/physiological thorax phantoms in radiotherapy. The main focus is on anthropomorphic, deformable thorax motion phantoms. This review also discusses the applications of three-dimensional (3D) printing technology for the fabrication of thorax phantoms.
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Affiliation(s)
- Mahdieh Tajik
- Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Iran Tehran district 6 poursina st Tehran University of Medical Sciences, Tehran, 1416753955, Iran (the Islamic Republic of)
| | - Mohammad Mohsen Akhlaqi
- Shahid Beheshti University of Medical Sciences, Iran,Tehran,Shahid Bahonar roundabout, Darabad Avenue,Masih Daneshvari Hospital, Tehran, 19839-63113, Iran (the Islamic Republic of)
| | - Somayeh Gholami
- Radiotherapy, Tehran University of Medical Sciences, Bolvarekeshavarz AVN, Tehran, Iran, Tehran, 1416753955, Iran (the Islamic Republic of)
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Wang J, Zheng Y, Chen Y, Hu X, Peng M, Fang Y, Shen B, Lu G. Laboratory indicators in COVID-19 and other pneumonias: Analysis for differential diagnosis and comparison of dynamic changes during 400-day follow-up. Comput Struct Biotechnol J 2021; 19:2497-2507. [PMID: 33936563 PMCID: PMC8076761 DOI: 10.1016/j.csbj.2021.04.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/24/2021] [Accepted: 04/24/2021] [Indexed: 11/30/2022] Open
Abstract
Background COVID-19 is spreading rapidly all over the world, the patients' symptoms can be easily confused with other pneumonia types. Therefore, it is valuable to seek a laboratory differential diagnostic protocol of COVID-19 and other pneumonia types on admission, and to compare the dynamic changes in laboratory indicators during follow-up. Methods A total of 143 COVID-19, 143 bacterial pneumonia and 145 conventional viral pneumonia patients were included. The model group consisted of 140 COVID-19, 80 bacterial pneumonia and 60 conventional viral pneumonia patients, who were age and sex matched. We established a differential diagnostic model based on the laboratory results of the model group on admission via a nomogram, which was validated in an external validation group. We also compared the 400-day dynamic changes of the laboratory indicators among groups. Results LASSO regression and multivariate logistic regression showed that eosinophils (Eos), total protein (TP), prealbumin (PA), potassium (K), high-density lipoprotein cholesterol (HDLC), and low-density lipoprotein cholesterol (LDLC) could differentiate COVID-19 from other pneumonia types. The C-index of the nomogram model was 0.922. Applying the nomogram to the external validation group showed an area under the curve (AUC) of 0.902. The 400-day change trends of the laboratory indexes varied among subgroups divided by sex, age, oxygenation index (OI), and pathogen. Conclusion The laboratory model was highly accurate at providing a new method to identify COVID-19 in pneumonia patients. The 400-day dynamic changes in laboratory indicators revealed that the recovery time of COVID-19 patients was not longer than that of other pneumonia types.
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Affiliation(s)
- Jing Wang
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
| | - Yufen Zheng
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
| | - Yijun Chen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
| | - Xingzhong Hu
- Department of Clinical Laboratory Medicine, Wenzhou Central Hospital, Dingli Clinical School of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Minfei Peng
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
| | - Yicheng Fang
- Department of Radiology, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
| | - Bo Shen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
| | - Guoguang Lu
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 150 Ximen Road, Linhai, Taizhou, Zhejiang Province, China
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Shimohigashi Y, Doi Y, Kouno Y, Yotsuji Y, Maruyama M, Kai Y, Toya R. Image quality evaluation of in-treatment four-dimensional cone-beam computed tomography in volumetric-modulated arc therapy for stereotactic body radiation therapy. Phys Med 2019; 68:10-16. [PMID: 31726265 DOI: 10.1016/j.ejmp.2019.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/18/2019] [Accepted: 11/01/2019] [Indexed: 11/27/2022] Open
Abstract
In this study, the image quality of in-treatment four-dimensional cone-beam computed tomography (In-4D-CBCT) obtained with various prescription doses (PDs) were quantitatively evaluated in volumetric-modulated arc therapy (VMAT) for stereotactic body radiation therapy (SBRT) of the lungs and liver. To assess image quality, we used a dynamic thorax phantom and three-dimensional (3D) abdominal phantom; In-4D-CBCT images were acquired with various PDs (from 5 to 12 Gy). The In-4D-CBCT with various PDs were compared with the reference images (pre-4D-CBCT). The image quality was evaluated using the signal-to-noise ratio (SNR), the contrast-to-noise ratio (CNR), and the Dice similarity coefficient (DSC). The fiducial marker positions with various PDs were compared with those of the reference images. For the dynamic thorax phantom, the difference between pre- and In-4D-CBCT in terms of SNR and CNR decreased, as the PD increased from 6 to 12 Gy. The median DSC ranged from 0.7 to 0.74, and showed good similarity. For the 3D abdominal phantom, the difference between pre- and In-4D-CBCT in terms of SNR and CNR decreased as the PD increased from 5 to 6 Gy; conversely, it increased as the PD increased from 7 to 8 Gy. The fiducial marker positions were within 1.0 mm for all PDs. We concluded that the image quality of In-4D-CBCT degraded compared with the reference image; however, it was sufficiently accurate for assessing the intra-fractional tumor position in VMAT for SBRT of the lungs and liver both in terms of the target volume similarity and accuracy of the fiducial marker position.
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Affiliation(s)
| | - Yasuhiro Doi
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Yumiko Kouno
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Yohei Yotsuji
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Masato Maruyama
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Yudai Kai
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Ryo Toya
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
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Pallotta S, Calusi S, Masi L, Talamonti C, Marrazzo L, Foggi L, Casati M, Livi L, Simontacchi G, Desideri I, Lisci R. ADAM phantom to test 4D medical imaging and dose delivery devices. ACTA ACUST UNITED AC 2019; 64:105002. [DOI: 10.1088/1361-6560/ab1a49] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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Doi Y, Shimohigashi Y, Yotsuji Y, Maruyama M, Kai Y, Toya R. Target volume and motion position evaluation of four-dimensional cone-beam CT: comparison with 4D-CT using dynamic thorax phantom. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/ab1054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lambrecht M, Sonke JJ, Nestle U, Peulen H, Weber DC, Verheij M, Hurkmans CW. Quality assurance of four-dimensional computed tomography in a multicentre trial of stereotactic body radiotherapy of centrally located lung tumours. Phys Imaging Radiat Oncol 2018; 8:57-62. [PMID: 33458418 PMCID: PMC7807606 DOI: 10.1016/j.phro.2018.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 10/25/2018] [Accepted: 10/26/2018] [Indexed: 11/09/2022] Open
Abstract
Background and Purpose Extensive radiation therapy quality assurance (RTQA) programs are needed when advanced radiotherapy treatments are used. As part of the RTQA four dimensional computed tomography (4DCT) imaging performance needs to be assessed. Here we present the RTQA data related to 4DCT procedures used within the context of stereotactic body radiotherapy (SBRT) of centrally located lung tumours. It provides an overview of the 4DCT acquisition methods and achievable accuracy of imaging lung tumour volumes. Materials and Methods 3DCT and 4DCT images were acquired from a CIRS phantom with spheres of 7.5 and 12.5 mm radius using the institutional scan protocols. Regular asymmetric tumour motion was simulated with varying amplitudes and periods. Target volumes were reconstructed using auto-contouring with scanner specific thresholds. Volume and amplitudes deviations were assessed. Results Although acquisition parameters were rather homogeneous over the eleven institutions analysed, volume deviations were observed. Average volume deviations for the 12.5 mm sphere were 15% (−4% to 69%) at end of inspiration, 2% (−2% to 9.0%) at end of expiration and 12% (0% to 36%) at mid-ventilation. For the 7.5 mm sphere deviations were 13% (−99% to 65%), 16% (−34% to 66%) and 1% (−13% to 20%), respectively. The amplitude deviation was generally within 2 mm although underestimations up to 6 mm were observed. Conclusions The expiration phase was the most accurate phase to define the tumour volume and should be preferred for GTV delineation of tumours exhibiting large motion causing motion artefacts when using mid-ventilation or tracking techniques. The large variation found among the institutions indicated that further improvements in 4DCT imaging were possible. Recommendations for 4DCT QA have been formulated.
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Affiliation(s)
- Marie Lambrecht
- Department of Radiation Oncology, Catharina Hospital, Eindhoven, The Netherlands
| | - Jan-Jakob Sonke
- Department of Radiation Oncology, The Netherland Cancer Institute, Amsterdam, The Netherlands
| | - Ursula Nestle
- Department of Radiation Oncology, Kliniken Maria Hilf, Mönchengladbach, Germany.,Department of Radiation Oncology, University Medical Center, Freiburg, Germany
| | - Heike Peulen
- Department of Radiation Oncology, Catharina Hospital, Eindhoven, The Netherlands
| | - Damien C Weber
- Center for Proton Therapy, Paul Scherrer Institute, ETH Domain, Villigen, Switzerland
| | - Marcel Verheij
- Department of Radiation Oncology, The Netherland Cancer Institute, Amsterdam, The Netherlands
| | - Coen W Hurkmans
- Department of Radiation Oncology, Catharina Hospital, Eindhoven, The Netherlands
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Hermetet C, Saint-Martin P, Gambier A, Ribier L, Sautenet B, Rérolle C. Forensic age estimation using computed tomography of the medial clavicular epiphysis: a systematic review. Int J Legal Med 2018; 132:1415-1425. [DOI: 10.1007/s00414-018-1847-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 04/09/2018] [Indexed: 02/03/2023]
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13
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Guo B, Li JB, Wang W, Xu M, Li YK, Liu TH. A comparison of dosimetric variance for external-beam partial breast irradiation using three-dimensional and four-dimensional computed tomography. Onco Targets Ther 2016; 9:1857-63. [PMID: 27099517 PMCID: PMC4821394 DOI: 10.2147/ott.s100629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose To investigate the potential dosimetric benefits from four-dimensional computed tomography (4DCT) compared with three-dimensional computed tomography (3DCT) in radiotherapy treatment planning for external-beam partial breast irradiation (EB-PBI). Patients and methods 3DCT and 4DCT scan sets were acquired for 20 patients who underwent EB-PBI. The volume of the tumor bed (TB) was determined based on seroma or surgical clips on 3DCT images (defined as TB3D) and the end inhalation (EI) and end exhalation (EE) phases of 4DCT images (defined as TBEI and TBEE, respectively). The clinical target volume (CTV) consisted of the TB plus a 1.0 cm margin. The planning target volume (PTV) was the CTV plus 0.5 cm (defined as PTV3D, PTVEI, and PTVEE). For each patient, a conventional 3D conformal plan (3D-CRT) was generated (defined as EB-PBI3D, EB-PBIEI, and EB-PBIEE). Results The PTV3D, PTVEI, and PTVEE were similar (P=0.549), but the PTV coverage of EB-PBI3D was significantly less than that of EB-PBIEI or EB-PBIEE (P=0.001 and P=0.025, respectively). There were no significant differences in the homogeneity or conformity indexes between the three treatment plans (P=0.125 and P=0.536, respectively). The EB-PBI3D plan resulted in the largest organs at risk dose. Conclusion There was a significant benefit for patients when using 3D-CRT based on 4DCT for EB-PBI with regard to reducing nontarget organ exposure. Respiratory motion did not affect the dosimetric distribution during free breathing, but might result in poor dose coverage when the PTV is determined using 3DCT.
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Affiliation(s)
- Bing Guo
- School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China; Department of Radiation Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People's Republic of China
| | - Jian-Bin Li
- Department of Radiation Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People's Republic of China
| | - Wei Wang
- Department of Radiation Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People's Republic of China
| | - Min Xu
- Department of Radiation Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People's Republic of China
| | - Yan-Kang Li
- Department of Radiation Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People's Republic of China; School of Medicine, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Tong-Hai Liu
- Department of Radiation Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People's Republic of China
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Shimohigashi Y, Araki F, Maruyama M, Nakato K, Nakaguchi Y, Kai Y. Evaluation of target localization accuracy for image-guided radiation therapy by 3D and 4D cone-beam CT in the presence of respiratory motion: a phantom study. Biomed Phys Eng Express 2016. [DOI: 10.1088/2057-1976/2/2/025008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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15
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Jurkovic IA, Papanikolaou N, Stathakis S, Li Y, Patel A, Vincent J, Mavroidis P. Assessment of Lung Tumour Motion and Volume Size Dependencies Using Various Evaluation Measures. J Med Imaging Radiat Sci 2016; 47:30-42.e1. [DOI: 10.1016/j.jmir.2015.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/09/2015] [Accepted: 11/26/2015] [Indexed: 11/26/2022]
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Chvetsov AV, Sandison GA, Schwartz JL, Rengan R. Ill-posed problem and regularization in reconstruction of radiobiological parameters from serial tumor imaging data. Phys Med Biol 2015; 60:8491-503. [DOI: 10.1088/0031-9155/60/21/8491] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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17
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Chuang HC, Hsu HY, Chiu WH, Tien DC, Wu RH, Hsu CH. Verification and compensation of respiratory motion using an ultrasound imaging system. Med Phys 2015; 42:1193-9. [DOI: 10.1118/1.4907958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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O'Connell BF, Irvine DM, Cole AJ, Hanna GG, McGarry CK. Optimizing geometric accuracy of four-dimensional CT scans acquired using the wall- and couch-mounted Varian® Real-time Position Management™ camera systems. Br J Radiol 2014; 88:20140624. [PMID: 25470359 DOI: 10.1259/bjr.20140624] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE The aim of this study was to identify sources of anatomical misrepresentation owing to the location of camera mounting, tumour motion velocity and image processing artefacts in order to optimize the four-dimensional CT (4DCT) scan protocol and improve geometrical-temporal accuracy. METHODS A phantom with an imaging insert was driven with a sinusoidal superior-inferior motion of varying amplitude and period for 4DCT scanning. The length of a high-density cube within the insert was measured using treatment planning software to determine the accuracy of its spatial representation. Scan parameters were varied, including the tube rotation period and the cine time between reconstructed images. A CT image quality phantom was used to measure various image quality signatures under the scan parameters tested. RESULTS No significant difference in spatial accuracy was found for 4DCT scans carried out using the wall- or couch-mounted camera for sinusoidal target motion. Greater spatial accuracy was found for 4DCT scans carried out using a tube rotation speed of 0.5 s rather than 1.0 s. The reduction in image quality when using a faster rotation speed was not enough to require an increase in patient dose. CONCLUSION The 4DCT accuracy may be increased by optimizing scan parameters, including choosing faster tube rotation speeds. Peak misidentification in the recorded breathing trace may lead to spatial artefacts, and this risk can be reduced by using a couch-mounted infrared camera. ADVANCES IN KNOWLEDGE This study explicitly shows that 4DCT scan accuracy is improved by scanning with a faster CT tube rotation speed.
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Affiliation(s)
- B F O'Connell
- 1 Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, UK
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