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Page 1
CT and cone-beam CT of ablative radiation therapy for pancreatic cancer with expert organ-at-risk contours.
Hong J, Reyngold M, Crane C, Cuaron J, Hajj C, Mann J, Zinovoy M, Yorke E, LoCastro E, Apte AP, Mageras G. Hong J, et al. Sci Data. 2022 Oct 21;9(1):637. doi: 10.1038/s41597-022-01758-9. Sci Data. 2022. PMID: 36271000 Free PMC article.
The image datasets (one CT for treatment planning and two CBCT scans at the time of treatment per patient) were collected from 40 patients. All scans were acquired with the patient in the treatment position and in a deep inspiration breath-hold state. ...
The image datasets (one CT for treatment planning and two CBCT scans at the time of treatment per patient) were collected from 40 pat …
Automatic tracking of arbitrarily shaped implanted markers in kilovoltage projection images: a feasibility study.
Regmi R, Lovelock DM, Hunt M, Zhang P, Pham H, Xiong J, Yorke ED, Goodman KA, Rimner A, Mostafavi H, Mageras GS. Regmi R, et al. Med Phys. 2014 Jul;41(7):071906. doi: 10.1118/1.4881335. Med Phys. 2014. PMID: 24989384 Free PMC article.
The mean success rate of automatic tracking with CBCT projections (11 frames per second, fps) of pancreas, gastroesophageal junction, and lung cancer patients was 100%, 99.1% (range 98%-100%), and 100%, respectively. ...
The mean success rate of automatic tracking with CBCT projections (11 frames per second, fps) of pancreas, gastroesophageal junction, …
Developments in megavoltage cone beam CT with an amorphous silicon EPID: reduction of exposure and synchronization with respiratory gating.
Sillanpaa J, Chang J, Mageras G, Riem H, Ford E, Todor D, Ling CC, Amols H. Sillanpaa J, et al. Med Phys. 2005 Mar;32(3):819-29. doi: 10.1118/1.1861522. Med Phys. 2005. PMID: 15839355
The results show that, with the proper choice of imaging parameters, the flatness and symmetry are reasonably good with as low as three beam pulses per projection image. Resolution of 5% electron density differences is possible in a contrast detail phantom using 100 projec …
The results show that, with the proper choice of imaging parameters, the flatness and symmetry are reasonably good with as low as three beam …
Low-dose megavoltage cone-beam computed tomography for lung tumors using a high-efficiency image receptor.
Sillanpaa J, Chang J, Mageras G, Yorke E, De Arruda F, Rosenzweig KE, Munro P, Seppi E, Pavkovich J, Amols H. Sillanpaa J, et al. Med Phys. 2006 Sep;33(9):3489-97. doi: 10.1118/1.2222075. Med Phys. 2006. PMID: 17022245
A synchronization circuit allows us to limit the exposure to one beam pulse [0.028 monitor units (MU)] per projection image. 150-500 images (4.2-13.9 MU total) are collected during a one-minute scan and reconstructed using a filtered backprojection algorithm. ...
A synchronization circuit allows us to limit the exposure to one beam pulse [0.028 monitor units (MU)] per projection image. 150-500 …
The CT motion quantitation of lung lesions and its impact on PET-measured SUVs.
Erdi YE, Nehmeh SA, Pan T, Pevsner A, Rosenzweig KE, Mageras G, Yorke ED, Schoder H, Hsiao W, Squire OD, Vernon P, Ashman JB, Mostafavi H, Larson SM, Humm JL. Erdi YE, et al. J Nucl Med. 2004 Aug;45(8):1287-92. J Nucl Med. 2004. PMID: 15299050 Free article. Clinical Trial.
PET data were acquired after intravenous injection of about 444-555 MBq of (18)F-FDG with a 1-h uptake period. The scanning time was 3 min per bed position for PET. Regularity in breathing was assisted by audio coaching. ...
PET data were acquired after intravenous injection of about 444-555 MBq of (18)F-FDG with a 1-h uptake period. The scanning time was 3 min …
Robust plan optimization for electromagnetic transponder guided hypo-fractionated prostate treatment using volumetric modulated arc therapy.
Zhang P, Hunt M, Happersett L, Yang J, Zelefsky M, Mageras G. Zhang P, et al. Phys Med Biol. 2013 Nov 7;58(21):7803-13. doi: 10.1088/0031-9155/58/21/7803. Epub 2013 Oct 21. Phys Med Biol. 2013. PMID: 24145674
The patient specific gating window resulted in tight anterior and inferior action levels (~1 mm) to protect rectal wall and bladder wall, and resulted in an average of four beam interruptions per fraction in the simulation. The robust-optimized plans achieved the same aver …
The patient specific gating window resulted in tight anterior and inferior action levels (~1 mm) to protect rectal wall and bladder wall, an …
SU-D-BRA-03: Simultaneous MV-KV Imaging for Intra-Fractional Motion Management during Volume Modulated Arc Therapy (VMAT) Delivery on the Varian TrueBeam.
Hunt M, Regmi R, Zhang P, Pham H, Wang P, Xiong J, Morf D, Mageras G. Hunt M, et al. Med Phys. 2012 Jun;39(6Part3):3616. doi: 10.1118/1.4734681. Med Phys. 2012. PMID: 28517377
Standard deviation averaged 0.06 cm but increased to 0.12 cm with large instantaneous motion and less MV dose per frame. MV frame averaging and inaccuracies in MV image gantry angle determination also affected accuracy, particularly with significant motion. ...
Standard deviation averaged 0.06 cm but increased to 0.12 cm with large instantaneous motion and less MV dose per frame. MV frame ave …
Predictive treatment management: incorporating a predictive tumor response model into robust prospective treatment planning for non-small cell lung cancer.
Zhang P, Yorke E, Hu YC, Mageras G, Rimner A, Deasy JO. Zhang P, et al. Int J Radiat Oncol Biol Phys. 2014 Feb 1;88(2):446-52. doi: 10.1016/j.ijrobp.2013.10.038. Epub 2013 Dec 5. Int J Radiat Oncol Biol Phys. 2014. PMID: 24315562 Free PMC article.
CONCLUSIONS: PTP, incorporating a tumor regression model from the start, represents a new approach to increase tumor dose without increasing toxicities, and reduce clinical workload compared with the adaptive approach, although model verification using per-patient midcours …
CONCLUSIONS: PTP, incorporating a tumor regression model from the start, represents a new approach to increase tumor dose without increasing …
Respiration-correlated spiral CT: a method of measuring respiratory-induced anatomic motion for radiation treatment planning.
Ford EC, Mageras GS, Yorke E, Ling CC. Ford EC, et al. Med Phys. 2003 Jan;30(1):88-97. doi: 10.1118/1.1531177. Med Phys. 2003. PMID: 12557983
By selecting the appropriate slices, a full CT image set is generated at several phases, typically 7-11 per cycle. The CT parameters are chosen to optimize the temporal resolution while minimizing the spatial gap between slices at successive respiratory cycles. ...
By selecting the appropriate slices, a full CT image set is generated at several phases, typically 7-11 per cycle. The CT parameters …