TH-C-ValB-05: Rapid Low-Dose 3D Image-Guided Treatment Verification of Sites Prone to Respiratory Motion Using Breath-Hold On-Board Digital Tomosynthesis (DTS)

2006 ◽  
Vol 33 (6Part21) ◽  
pp. 2268-2269 ◽  
Author(s):  
D Godfrey ◽  
F Yin ◽  
Z Wang ◽  
S Yoo ◽  
M Oldham ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
Low Dose ◽  
Breath Hold ◽  
Digital Tomosynthesis ◽  
3D Image ◽  
Treatment Verification ◽  
Image Guided

scholarly journals Impact of Breath-Hold Level on Positional Error Aligned by Stent/Lipiodol in Hepatobiliary Radiotherapy with Breath-Hold Respiratory Control

2020 ◽  
Author(s):  
Tzu-Jie Huang ◽  
Yun Tien ◽  
Jian-Kuen Wu ◽  
Wen-Tao Huang ◽  
Jason Chia-Hsien Cheng
Keyword(s):  
Respiratory Motion ◽  
Respiratory Control ◽  
Three Dimensions ◽  
Cone Beam ◽  
Breath Hold ◽  
Positional Error ◽  
Related Factors ◽  
Motion Management ◽  
Factors Associated ◽  
Image Guided

Abstract Background: Respiratory motion management with breath hold for patients with hepatobiliary cancers remain a challenge in the precise positioning for radiotherapy. We compared different image-guided alignment markers for estimating positional errors, and investigated the factors associated with positional errors under breath-hold control.Methods: Spirometric motion management system (SDX) for breath holds was used in 44 patients with hepatobiliary tumor. Among them, 28 patients had a stent or embolized materials (lipiodol) as alignment markers. Cone-beam computed tomography (CBCT) and kV-orthogonal images were compared for accuracy between different alignment references. Breath-hold level (BHL) was practiced, and BHL variation (ΔBHL) was defined as the standard deviation in differences between actual BHLs and baseline BHL. Mean BHL, ΔBHL, and body-related factors were analyzed for the association with positional errors.Results: Using the reference CBCT, the correlations of positional errors were significantly higher in those with stent/lipiodol than when the vertebral bone was used for alignment in three dimensions. Patients with mean BHL >1.4 L were significantly taller (167.6 cm vs. 161.6 cm, p=0.03) and heavier (67.1 kg vs. 57.4 kg, p=0.02), and had different positional error in the craniocaudal direction (-0.26 cm [caudally] vs. +0.09 cm [cranially], p=0.01) than those with mean BHL <1.4 L. Positional errors were similar for patients with ΔBHL<0.03 L and >0.03 L.Conclusion: Under rigorous breath-hold respiratory control, BHL correlated with body weight and height. With more accurate alignment reference by stent/lipiodol, actual BHL but not breath-hold variation was associated with craniocaudal positional errors.

Diffeomorphic Respiratory Motion Estimation of Thoracoabdominal Organs for Image‐Guided Interventions

2021 ◽  
Author(s):  
Long Lei ◽  
Li Huang ◽  
Baoliang Zhao ◽  
Ying Hu ◽  
Zhongliang Jiang ◽  
...  
Keyword(s):  
Motion Estimation ◽  
Respiratory Motion ◽  
Image Guided

Role of digital tomosynthesis in the context of tuberculosis contact investigation: comparisons with digital radiography

2021 ◽  
pp. 028418512110224
Author(s):  
Jeongha Mok ◽  
Jeong A Yeom ◽  
Su Won Nam ◽  
Jun Mi Yoo ◽  
Ji Won Lee ◽  
...  
Keyword(s):  
Digital Radiography ◽  
Low Dose ◽  
Close Contact ◽  
Correct Diagnosis ◽  
Lower Sensitivity ◽  
Digital Tomosynthesis ◽  
Reference Standard ◽  
Contact Investigation ◽  
Screening Study ◽  
Low Dose Computed Tomography

Background Chest radiography value as a screening tool in those exposed to pulmonary tuberculosis (TB) is reduced by its lower sensitivity to detect small intrapulmonary lesions. Purpose To evaluate the efficacy of digital tomosynthesis (DTS) screening of individuals that had contacted persons with active TB using low-dose computed tomography (CT) as the reference standard methods. Material and Methods This retrospective, community-based screening study of 90 adults who had been in close contact with a TB case was undertaken at our institution. All individuals underwent clinical evaluation, digital radiography (DR), DTS, and low-dose chest CT. Observers assessed and classified DR and DTS images using CT as the reference-standard method. Based on clinical and imaging findings, TB status was classified as normal, latent, minimal, subclinical, and active. Diagnostic performances of DTS and DR for the interpretation of correct diagnosis were calculated. Results The estimated effective doses for DR, DTS, and low-dose CT were 0.01 mSv, 0.1 mSv, and 0.33 mSv, respectively. TB statuses of the 90 individuals were as follows: 62 latent (68.9%); two subclinical (2.2%); and one minimal (1.1%). The sensitivities, specificities, and accuracies of DTS and DR in the interpretation of correct diagnosis were 75.8%, 100%, 91.1% and 48.5%, 96.5%, 78.9%, respectively. Conclusion DTS appears to be superior to DR for the detection of lung lesions in individuals with TB contacts. DTS can offer a reasonable option for TB contact investigation.

Intra-breath-hold residual motion of image-guided DIBH liver-SBRT: An estimation by ultrasound-based monitoring correlated with diaphragm position in CBCT

2018 ◽  
Vol 129 (3) ◽  
pp. 441-448 ◽  
Author(s):  
Lena Vogel ◽  
Dwi Seno Kuncoro Sihono ◽  
Christel Weiss ◽  
Frank Lohr ◽  
Florian Stieler ◽  
...  
Keyword(s):  
Breath Hold ◽  
Image Guided ◽  
Diaphragm Position ◽  
Residual Motion ◽  
Liver Sbrt
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