Isocenter Verification in Radiotherapy Clinical Practice Using Virtual Simulation

2016 ◽  
pp. 211-230
Author(s):  
George K. Matsopoulos ◽  
Pantelis A. Asvestas ◽  
Vasiliki Markaki ◽  
Kalliopi Platoni ◽  
Vasilios Kouloulias
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Clinical Practice ◽  
Treatment Planning ◽  
Virtual Simulation ◽  
Ct Scans ◽  
Setup Error ◽  
Treatment Delivery ◽  
Abdominal Tumors ◽  
Patient Setup

This chapter presents an overview of the procedures that are used for the verification of the patient position during radiotherapy. Furthermore, a method for the verification of the radiotherapy isocenter prior to treatment delivery is proposed. The method is based on the alignment of two Computed Tomography (CT) scans: a scan, which is acquired for treatment planning, and an additional verification scan, which is acquired prior to the treatment delivery. The proposed method was applied to CT scans, acquired from 20 patients with abdominal tumors and 20 patients with breast/lung cancer. The results of the proposed method were compared with the ones obtained using conventional methods, indicating that the estimated isocenter displacement can be translated into patient setup error inside the treatment room.

Isocenter Verification in Radiotherapy Clinical Practice Using Virtual Simulation

2017 ◽  
pp. 1703-1724
Author(s):  
George K. Matsopoulos ◽  
Pantelis A. Asvestas ◽  
Vasiliki Markaki ◽  
Kalliopi Platoni ◽  
Vasilios Kouloulias
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Clinical Practice ◽  
Treatment Planning ◽  
Virtual Simulation ◽  
Ct Scans ◽  
Setup Error ◽  
Treatment Delivery ◽  
Abdominal Tumors ◽  
Patient Setup

This chapter presents an overview of the procedures that are used for the verification of the patient position during radiotherapy. Furthermore, a method for the verification of the radiotherapy isocenter prior to treatment delivery is proposed. The method is based on the alignment of two Computed Tomography (CT) scans: a scan, which is acquired for treatment planning, and an additional verification scan, which is acquired prior to the treatment delivery. The proposed method was applied to CT scans, acquired from 20 patients with abdominal tumors and 20 patients with breast/lung cancer. The results of the proposed method were compared with the ones obtained using conventional methods, indicating that the estimated isocenter displacement can be translated into patient setup error inside the treatment room.

Isocenter Verification in Radiotherapy Clinical Practice Using Virtual Simulation

Oncology ◽  
2017 ◽  
pp. 689-708
Author(s):  
George K. Matsopoulos ◽  
Pantelis A. Asvestas ◽  
Vasiliki Markaki ◽  
Kalliopi Platoni ◽  
Vasilios Kouloulias
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Clinical Practice ◽  
Treatment Planning ◽  
Virtual Simulation ◽  
Ct Scans ◽  
Setup Error ◽  
Treatment Delivery ◽  
Abdominal Tumors ◽  
Patient Setup

This chapter presents an overview of the procedures that are used for the verification of the patient position during radiotherapy. Furthermore, a method for the verification of the radiotherapy isocenter prior to treatment delivery is proposed. The method is based on the alignment of two Computed Tomography (CT) scans: a scan, which is acquired for treatment planning, and an additional verification scan, which is acquired prior to the treatment delivery. The proposed method was applied to CT scans, acquired from 20 patients with abdominal tumors and 20 patients with breast/lung cancer. The results of the proposed method were compared with the ones obtained using conventional methods, indicating that the estimated isocenter displacement can be translated into patient setup error inside the treatment room.

Isocenter Verification in Radiotherapy Clinical Practice Using Virtual Simulation

2019 ◽  
pp. 863-884
Author(s):  
George K. Matsopoulos ◽  
Pantelis A. Asvestas ◽  
Vasiliki Markaki ◽  
Kalliopi Platoni ◽  
Vasilios Kouloulias
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Clinical Practice ◽  
Treatment Planning ◽  
Virtual Simulation ◽  
Ct Scans ◽  
Setup Error ◽  
Treatment Delivery ◽  
Abdominal Tumors ◽  
Patient Setup

This chapter presents an overview of the procedures that are used for the verification of the patient position during radiotherapy. Furthermore, a method for the verification of the radiotherapy isocenter prior to treatment delivery is proposed. The method is based on the alignment of two Computed Tomography (CT) scans: a scan, which is acquired for treatment planning, and an additional verification scan, which is acquired prior to the treatment delivery. The proposed method was applied to CT scans, acquired from 20 patients with abdominal tumors and 20 patients with breast/lung cancer. The results of the proposed method were compared with the ones obtained using conventional methods, indicating that the estimated isocenter displacement can be translated into patient setup error inside the treatment room.

scholarly journals Patient setup error and day-to-day esophageal motion error analyzed by cone-beam computed tomography in radiation therapy

2010 ◽  
Vol 49 (4) ◽  
pp. 485-490 ◽  
Author(s):  
Hideomi Yamashita ◽  
Akihiro Haga ◽  
Yayoi Hayakawa ◽  
Kae Okuma ◽  
Kiyoshi Yoda ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Therapy ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Setup Error ◽  
Motion Error ◽  
Patient Setup ◽  
Esophageal Motion

scholarly journals The Effect of Contrast-enhanced Computed Tomography (CT) Scans on the Calculated Dose of Radiotherapy in a Thorax Phantom

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Athar Ehtiati ◽  
Payman Hejazi ◽  
Mohsen Bakhshandeh ◽  
Ali Jabbary Arfaee ◽  
Eftekhar Rajab Bolookat ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Contrast Media ◽  
Ct Scan ◽  
Treatment Planning ◽  
Tumor Volume ◽  
Ct Scans ◽  
Contrast Enhanced ◽  
Enhanced Ct ◽  
Enhanced Computed Tomography ◽  
Contrast Enhanced Computed Tomography

Background: Despite the benefits of contrast-enhanced computed tomography (CT) scans in better tumor volume delineation, it can affect the accuracy of dose calculation in radiation therapy. This study examined this effect on a thorax phantom. Objectives: The influence of different variables including the concentrations of the Visipaque contrast media, tumor sizes, and CT scan energies on the dose measurement was examined. Methods: Transparent cylinders containing the contrast media were inserted in the lung area of the phantom and the CT scans were made. Non-enhanced CT scans were also acquired. Treatment planning using 2 opposite fields was performed on the CT scans and the doses were calculated in the treatment planning system. The results of the 2 sets of enhanced and non-enhanced CT scans were compared. Results: The correlation between concentration and the percentage of mean dose of the tumor volume was significant in 2 of the tumor sizes. The differences in the mean doses of the 2 plans were examined and more than 3% increase was observed in higher concentrations of the contrast media. Conclusions: According to this study, the suitable concentration of the contrast media administered and the CT scan energy should be considered. This would help to decrease the discrepancies between the calculated and delivered dose in radiotherapy treatments to a clinically acceptable level. The importance of time delays for CT scans after administration of the contrast media is emphasized.

Four-dimensional CT scans for treatment planning in stereotactic radiotherapy for stage I lung cancer

2004 ◽  
Vol 60 (4) ◽  
pp. 1283-1290 ◽  
Author(s):  
René W.M. Underberg ◽  
Frank J. Lagerwaard ◽  
Johan P. Cuijpers ◽  
Ben J. Slotman ◽  
John R. van Sörnsen de Koste ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Treatment Planning ◽  
Stereotactic Radiotherapy ◽  
Stage I ◽  
Ct Scans ◽  
Stage I Lung Cancer
Sign in / Sign up

Export Citation Format

Share Document