Development of a storage phosphor imaging system for proton pencil beam spot profile determination

2021 ◽  
Author(s):  
Jufri Setianegara ◽  
Thomas R. Mazur ◽  
Yao Hao ◽  
Deshan Yang ◽  
H. Harold Li
Keyword(s):  
Imaging System ◽  
Pencil Beam ◽  
Beam Spot ◽  
Storage Phosphor

scholarly journals Upgrade of gamma electron vertex imaging system for high-performance range verification in pencil beam scanning proton therapy

2021 ◽  
Author(s):  
Sung Hun Kim ◽  
Jong Hwi Jeong ◽  
Youngmo Ku ◽  
Jaerin Jung ◽  
Sungkoo Cho ◽  
...  
Keyword(s):  
Proton Therapy ◽  
High Performance ◽  
Imaging System ◽  
Pencil Beam ◽  
Beam Scanning ◽  
Pencil Beam Scanning ◽  
Range Verification

Beam spot imaging system using a fluorescent screen for carbon-ion radiotherapy

2013 ◽  
Vol 63 (7) ◽  
pp. 1437-1440 ◽  
Author(s):  
K. Mizushima ◽  
E. Takeshita ◽  
T. Furukawa ◽  
Y. Hara ◽  
T. Shirai ◽  
...  
Keyword(s):  
Imaging System ◽  
Carbon Ion Radiotherapy ◽  
Beam Spot ◽  
Carbon Ion ◽  
Fluorescent Screen

SU-E-T-299: Proton Pencil Beam Spot Scanning Phase Space in the IBA System and the Clinical Implications for Superficial Targets

2012 ◽  
Vol 39 (6Part14) ◽  
pp. 3772-3772
Author(s):  
L Lin ◽  
C Ainsley ◽  
D Dolney ◽  
M Closset ◽  
F Dessy ◽  
...  
Keyword(s):  
Phase Space ◽  
Clinical Implications ◽  
Pencil Beam ◽  
Beam Spot ◽  
Spot Scanning

Image quality of an intraoral storage phosphor imaging system for normal anatomical structures, proximal caries and decalcified bone changes

1997 ◽  
Vol 13 (1) ◽  
pp. 23-34 ◽  
Author(s):  
Jyouji Yoneda ◽  
Takashi Sakurai ◽  
Kousuke Nishimura
Keyword(s):  
Image Quality ◽  
Imaging System ◽  
Anatomical Structures ◽  
Proximal Caries ◽  
Storage Phosphor ◽  
Bone Changes

Reliability of landmark identification in cephalometric radiography acquired by a storage phosphor imaging system

2004 ◽  
Vol 33 (5) ◽  
pp. 301-306 ◽  
Author(s):  
Y-J Chen ◽  
S-K Chen ◽  
H-W Huang ◽  
C-C Yao ◽  
H-F Chang
Keyword(s):  
Imaging System ◽  
Storage Phosphor ◽  
Landmark Identification

Characterization of a new scintillation imaging system for proton pencil beam dose rate measurements

2020 ◽  
Vol 65 (16) ◽  
pp. 165014
Author(s):  
Mahbubur Rahman ◽  
Petr Brůža ◽  
Katja M Langen ◽  
David J Gladstone ◽  
Xu Cao ◽  
...  
Keyword(s):  
Dose Rate ◽  
Imaging System ◽  
Pencil Beam ◽  
Beam Dose

Combination of multiple pencil-beam imaging to computed storage phosphor radiography: a new method

1991 ◽  
Vol 12 (3) ◽  
pp. 161-166 ◽  
Author(s):  
Risto Miettunen ◽  
Ossi Korhola ◽  
Sören Bondestam ◽  
Carl-Gustaf Standertskjöld-Nordenstam ◽  
Antti Lamminen ◽  
...  
Keyword(s):  
New Method ◽  
Pencil Beam ◽  
Storage Phosphor ◽  
Storage Phosphor Radiography

scholarly journals X-ray Fluorescence Computed Tomography (XFCT) Imaging with a Superfine Pencil Beam X-ray Source

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 236
Author(s):  
Ignacio O. Romero ◽  
Yile Fang ◽  
Michael Lun ◽  
Changqing Li
Keyword(s):  
Computed Tomography ◽  
Molecular Imaging ◽  
Imaging System ◽  
Pencil Beam ◽  
X Ray ◽  
Mm Algorithm ◽  
Imaging Tool ◽  
Good Target ◽  
Reconstructed Signal ◽  
Detector Placement

X-ray fluorescence computed tomography (XFCT) is a molecular imaging technique that can be used to sense different elements or nanoparticle (NP) agents inside deep samples or tissues. However, XFCT has not been a popular molecular imaging tool because it has limited molecular sensitivity and spatial resolution. We present a benchtop XFCT imaging system in which a superfine pencil-beam X-ray source and a ring of X-ray spectrometers were simulated using GATE (Geant4 Application for Tomographic Emission) Monte Carlo software. An accelerated majorization minimization (MM) algorithm with an L1 regularization scheme was used to reconstruct the XFCT image of molybdenum (Mo) NP targets. Good target localization was achieved with a DICE coefficient of 88.737%. The reconstructed signal of the targets was found to be proportional to the target concentrations if detector number, detector placement, and angular projection number are optimized. The MM algorithm performance was compared with the maximum likelihood expectation maximization (ML-EM) and filtered back projection (FBP) algorithms. Our results indicate that the MM algorithm is superior to the ML-EM and FBP algorithms. We found that the MM algorithm was able to reconstruct XFCT targets as small as 0.25 mm in diameter. We also found that measurements with three angular projections and a 20-detector ring are enough to reconstruct the XFCT images.

scholarly journals Storage Phosphor Plates: How Durable are they as a Digital Dental Radiographic System?

2004 ◽  
Vol 5 (2) ◽  
pp. 57-69 ◽  
Author(s):  
Aurelija Bedard ◽  
Tracy Dawn Davis ◽  
Christos Angelopoulos
Keyword(s):  
Imaging System ◽  
Image Acquisition ◽  
Additive Effect ◽  
Point Scale ◽  
Storage Phosphor ◽  
Dental Imaging ◽  
C Storage ◽  
Additional Group ◽  
Phosphor Plates

Abstract The aim of this in vitro investigation was to evaluate the durability of storage phosphor plates (SPPs) as a digital dental imaging system and to detect the factors that may contribute to possible reduced durability. A total of 140 new SPPs were divided into groups and exposed to the effects of the various handling steps during the image acquisition. An additional group of plates joined the existing plates in the Radiology Clinic and tested the additive effect of all these factors plus the effect of positioning the plates in a patient's mouth. The images resulting from these SPPs were regularly evaluated for the appearance of scratches as a sign of wear and rated by an oral radiologist using a 6 point scale. Although the manufacturer claims the SPPs can be used indefinitely, we found 95% of our plates were rendered non-diagnostic after only 50 uses. The manufacturer's claim for indefinite use of the SPPs seems to be questionable. Citation Bedard A, Davis TD, Angelopoulos C. Storage Phosphor Plates: How Durable are they as a Digital Dental Radiographic System? J Contemp Dent Pract 2004 May;(5)2:057-069.

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