Time evaluation of image-guided radiotherapy in patients with spinal bone metastases

2014 ◽  
Vol 190 (3) ◽  
pp. 287-292 ◽  
Author(s):  
H. Rief ◽  
D. Habermehl ◽  
K. Schubert ◽  
J. Debus ◽  
S.E. Combs
Keyword(s):  
Bone Metastases ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Spinal Bone Metastases ◽  
Time Evaluation

Development of a Quantitative Method Based on the Hill-Shading Technique for Assessing Morphological Changes in the Bone During Image-Guided Radiotherapy for Bone Metastasis

2021 ◽  
Vol 11 (8) ◽  
pp. 2109-2113
Author(s):  
Yoshinori Tanabe ◽  
Takayuki Ishida
Keyword(s):  
Bone Metastasis ◽  
Bone Metastases ◽  
High Frequency ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Normal Bone ◽  
Metastatic Lesions ◽  
Irradiation Field ◽  
Frequency Components ◽  
The Hill

We hypothesized that positioning corrections matching the image in image-guided radiotherapy (IGRT) for bone metastasis contain information on temporal structural changes in irradiated bone metastatic lesions during the treatment period. To extract and quantify these changes, a hill-shading technique was used to emphasize the characteristics of the structure. Spatial frequency components of the bone lesions were described based on hill-shading transformations of the images, and a quantification method was suggested. The matching images of 11 patients who received IGRT for lytic bone metastases were evaluated retrospectively. The hill-shading technique was applied to images of both metastatic lesions and normal bone outside the irradiation field. Outlined bone microstructures were analyzed by a two-dimensional power spectrum using fast Fourier transformation, and the frequency components were quantified. Correlations between the frequency components and cumulative radiation doses were analyzed between the irradiated metastatic bone and normal bone outside the irradiation field. The high-frequency components of the metastatic bone lesion images decreased by a mean of 7% (minimum: -0.2%, maximum: -13.2%) following cumulative irradiation doses of 20-30 Gy versus 0-10 Gy. In the normal bone outside the irradiation field, high-frequency components increased by a mean of 0.07% (minimum: -2.0%, maximum: +4.4%) following irradiation doses of 20-30 Gy versus 0-10 Gy. High-frequency components were significantly different between the normal bone and bone metastases following radiotherapy (p < 0.0001). Hill-shading transformation of matching images obtained during the treatment period enabled adaptation and evaluation of irradiation-induced changes in the microstructure of bone metastatic lesions.

Phantom validation of coregistration of PET and CT for image-guided radiotherapy

2004 ◽  
Vol 31 (5) ◽  
pp. 1083-1092 ◽  
Author(s):  
William C. Lavely ◽  
Christopher Scarfone ◽  
Hakan Cevikalp ◽  
Rui Li ◽  
Daniel W. Byrne ◽  
...  
Keyword(s):  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Phantom Validation

PO-1268: Survival prediction in geriatric patients after radiotherapy of spinal bone metastases

2020 ◽  
Vol 152 ◽  
pp. S667
Author(s):  
T. Bostel ◽  
T. Sprave ◽  
R. Förster ◽  
I. Schlampp ◽  
S. Akbaba ◽  
...  
Keyword(s):  
Bone Metastases ◽  
Geriatric Patients ◽  
Survival Prediction ◽  
Spinal Bone Metastases

scholarly journals The current status future of radiotherapy for spinal bone metastases

2015 ◽  
Vol 20 (4) ◽  
pp. 585-592 ◽  
Author(s):  
Yasuo Ejima ◽  
Yoshiro Matsuo ◽  
Ryohei Sasaki
Keyword(s):  
Bone Metastases ◽  
Current Status ◽  
Spinal Bone Metastases

Integration between in vivo dosimetry and image guided radiotherapy for lung tumors

2009 ◽  
Vol 36 (6Part1) ◽  
pp. 2206-2214 ◽  
Author(s):  
Angelo Piermattei ◽  
Savino Cilla ◽  
Luca Grimaldi ◽  
Domenico Sabatino ◽  
Andrea Fidanzio ◽  
...  
Keyword(s):  
Lung Tumors ◽  
In Vivo Dosimetry ◽  
Image Guided Radiotherapy ◽  
Image Guided
Sign in / Sign up

Export Citation Format

Share Document