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radiology, nuclear medicine & medical imaging (401) 401
humans (376) 376
index medicus (357) 357
radiotherapy (207) 207
respiration (187) 187
algorithms (159) 159
computed tomography (156) 156
medical imaging (156) 156
respiratory motion (156) 156
motion (153) 153
cancer (150) 150
radiation therapy (139) 139
movement (133) 133
4d ct (132) 132
lung neoplasms - diagnostic imaging (125) 125
lungs (119) 119
phantoms, imaging (118) 118
reproducibility of results (115) 115
medical image processing (110) 110
male (108) 108
patients (108) 108
four-dimensional computed tomography - methods (106) 106
4d-ct (105) 105
computerised tomography (103) 103
reconstruction (103) 103
tomography, x-ray computed - methods (101) 101
female (100) 100
lung (96) 96
image reconstruction (91) 91
pneumodynamics (90) 90
imaging, three-dimensional - methods (88) 88
oncology (88) 88
sensitivity and specificity (85) 85
computed-tomography (83) 83
lung neoplasms - radiotherapy (80) 80
radiotherapy planning, computer-assisted - methods (79) 79
aged (77) 77
radiation-therapy (77) 77
radiology and nuclear medicine (77) 77
medical image reconstruction (76) 76
middle aged (76) 76
registration (76) 76
pneumodyamics, respiration (75) 75
4-dimensional computed-tomography (71) 71
computerized tomography (69) 69
accuracy (68) 68
lung cancer (68) 68
magnetic resonance imaging (66) 66
tumor motion (66) 66
four-dimensional computed tomography (65) 65
dosimetry (64) 64
image processing, computer-assisted - methods (64) 64
tumours (61) 61
hematology, oncology and palliative medicine (60) 60
image registration (60) 60
phantoms (60) 60
image data processing or generation, in general (56) 56
radiology (56) 56
digital computing or data processing equipment or methods, specially adapted for specific applications (55) 55
neoplasms (55) 55
radiographic image interpretation, computer-assisted - methods (54) 54
ct imaging (53) 53
organ motion (52) 52
engineering, biomedical (51) 51
tumors (51) 51
radiotherapy dosage (50) 50
computer simulation (49) 49
computerised tomographs (49) 49
lung - diagnostic imaging (49) 49
respiratory mechanics (49) 49
image processing (48) 48
anatomy (47) 47
computertomographie (47) 47
adult (46) 46
planning (45) 45
lung-cancer (42) 42
respiratory-gated imaging techniques - methods (42) 42
time factors (41) 41
medical image artifacts (40) 40
medicine & public health (40) 40
simulation (39) 39
tomography (39) 39
biological material, e.g. blood, urine; haemocytometers (38) 38
cone-beam ct (38) 38
feasibility studies (38) 38
positron-emission tomography - methods (38) 38
aged, 80 and over (37) 37
deformable registration (37) 37
lung neoplasms - physiopathology (37) 37
segmentation (37) 37
cone-beam computed tomography - methods (36) 36
deformable image registration (35) 35
medical image quality (35) 35
radiation doses (35) 35
radiographic image enhancement - methods (35) 35
retrospective studies (35) 35
radiotherapy planning, computer-assisted (34) 34
tomography, x-ray computed (34) 34
hemodynamics (33) 33
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Journal Article
International Journal of Radiation Oncology, Biology, Physics, ISSN 0360-3016, 2011, Volume 80, Issue 5, pp. 1573 - 1580
Journal Article
Book Review
Journal of Applied Clinical Medical Physics, ISSN 1526-9914, 03/2015, Volume 16, Issue 2, pp. 23 - 32
Four‐dimensional computed tomography (4D CT) is used to account for respiratory motion in radiation treatment planning, but artifacts resulting from the acquisition and postprocessing limit its accuracy... 
radiation therapy simulation | correlation | 4D CT | artifacts | Artifacts | Radiation therapy simulation | Correlation | VELOCITY | 4-DIMENSIONAL COMPUTED-TOMOGRAPHY | VOLUMES | RECONSTRUCTION | ALGORITHM | RESPIRATORY MOTION | 4D-CT | IMPACT | IMAGES | DISPLACEMENT | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | Studies | Medical imaging | Simulation | Enrollments | Quality | Radiation therapy | Patients | Cancer therapies | Methods
Journal Article
BRITISH JOURNAL OF RADIOLOGY, ISSN 0007-1285, 2018, Volume 91, Issue 1082, p. 20170597
... artefact-free fast-helical scans. A motion phantom and 5 patients were imaged 25 times under free-breathing conditions in alternating directions with a 64-slice CT scanner employing a low-dose fast-helical protocol... 
CONE-BEAM CT | 4D-CT | PHASE | ACQUISITION | DISPLACEMENT | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | TOOL | Artifacts | Motion | Image Processing, Computer-Assisted | Humans | Tomography, Spiral Computed - methods | Lung - diagnostic imaging | Phantoms, Imaging | Respiration | Full Paper | dose computation | Physics & Technology | Treatment planning
Journal Article
Medical Physics, ISSN 0094-2405, 10/2013, Volume 40, Issue 10, pp. 101907 - n/a
.... The current standard 4D CT technique using phase-based sorting frequently results in artifacts, which may deteriorate the accuracy of ventilation imaging... 
Segmentation | ventilation | Pneumodyamics, respiration | artifact | Digital computing or data processing equipment or methods, specially adapted for specific applications | Computed tomography | image segmentation | functional imaging | four‐dimensional (4D) CT | Computerised tomographs | medical image processing | Medical imaging | Medical image segmentation | Spatial analysis | diagnostic radiography | Biological material, e.g. blood, urine; Haemocytometers | Single photon emission computed tomography | Spatial dimensions | Digital image processing | lung | computerised tomography | Lungs | Image data processing or generation, in general | Cancer | correlation methods | Medical image artifacts | Four-dimensional (4D) CT | Ventilation | Lung | Artifact | Functional imaging | 4-DIMENSIONAL COMPUTED-TOMOGRAPHY | TISSUE EXPANSION | four-dimensional (4D) CT | RADIATION-THERAPY | FUNCTIONAL AVOIDANCE | ARTIFACTS | RADIOTHERAPY | REGISTRATION-BASED MEASURES | REGIONAL VENTILATION | AUDIOVISUAL BIOFEEDBACK | DATA SETS | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | Four-Dimensional Computed Tomography - methods | Artifacts | Pulmonary Ventilation | Humans | Middle Aged | Aged, 80 and over | Female | Male | Aged | Lung - diagnostic imaging | Image Processing, Computer-Assisted - methods | Lung - physiology | Radiation Imaging Physics
Journal Article
Medical Physics, ISSN 0094-2405, 08/2019, Volume 46, Issue 8, pp. 3462 - 3474
...). However, clinical 4D CT image data often suffer from severe artifacts caused by insufficient projection data coverage due to the inability of current commercial 4D CT imaging protocols to adapt... 
motion artifacts | radiotherapy | 4D CT | RECONSTRUCTION | ACQUISITION | GUIDANCE | 4D-CT | IMPACT | MOTION | IMAGES | STEREOTACTIC BODY RADIOTHERAPY | ARTIFACTS | OPTIMIZATION | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | Four-Dimensional Computed Tomography - methods | Respiratory-Gated Imaging Techniques
Journal Article
Medical Physics, ISSN 0094-2405, 2005, Volume 32, Issue 4, pp. 1176 - 1186
.... Respiratory motion, however, induces artifacts in CBCT, while the respiratory correlated procedures, developed to reduce motion artifacts in axial and helical CT are not suitable for such CBCT scanners... 
cone beam CT | 4D radiotherapy | respiratory motion | image guidance | image processing | Medical image quality | Image scanners | Computed radiography | Medical imaging | motion measurement | Anatomy | Linear accelerators | Biological signal processing | Cone beam computed tomography | Computed tomography | Medical X‐ray imaging | radiation monitoring | tomography | radiation therapy | Cancer | Respiratory motion | Image guidance | Cone beam CT | ALGORITHM | MOTION ARTIFACTS | PORTAL IMAGING DEVICE | COMPUTED-TOMOGRAPHY | RADIATION-THERAPY | LUNG-CANCER | IRRADIATION | RADIOTHERAPY | FLAT-PANEL IMAGER | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | VERIFICATION | Models, Theoretical | Motion | Movement | Humans | Imaging, Three-Dimensional - methods | Tomography, Spiral Computed - methods | Lung Neoplasms - pathology | Tomography, X-Ray Computed | Fluoroscopy | Algorithms | Image Processing, Computer-Assisted | Radiotherapy - methods | Lung Neoplasms - diagnostic imaging | Radiometry | Phantoms, Imaging | Respiration | Radiographic Image Interpretation, Computer-Assisted | Radiotherapy Planning, Computer-Assisted | Particle Accelerators | Radiographic Image Enhancement | FLUOROSCOPY | RADIATION MONITORING | NEOPLASMS | BEAMS | LUNGS | COMPUTERIZED TOMOGRAPHY | LINEAR ACCELERATORS | IMAGE PROCESSING | IMAGES | RESPIRATION | RADIOLOGY AND NUCLEAR MEDICINE | PHANTOMS
Journal Article
Medical Physics, ISSN 0094-2405, 2013, Volume 40, Issue 10, pp. 101912 - n/a
Purpose: Image reconstruction and motion model estimation in four-dimensional cone-beam CT (4D-CBCT... 
iterative methods | Medical image quality | Computed radiography | phantoms | Digital computing or data processing equipment or methods, specially adapted for specific applications | Computed tomography | motion estimation | motion artifacts correction | Numerical approximation and analysis | tumours | Computerised tomographs | medical image processing | Reconstruction | Medical imaging | Analysis of motion | image reconstruction | Biological material, e.g. blood, urine; Haemocytometers | 4D‐CBCT | computerised tomography | Cone beam computed tomography | motion‐compensated image reconstruction | Lungs | Image data processing or generation, in general | Medical image reconstruction | Image enhancement | Cancer | Medical image artifacts | Motion-compensated image reconstruction | 4D-CBCT | Motion artifacts correction | motion-compensated image reconstruction | IMPLEMENTATION | REGISTRATION | MODEL | ALGORITHMS | RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING | COMPUTED-TOMOGRAPHY | Four-Dimensional Computed Tomography - methods | Movement | Time Factors | Humans | Lung Neoplasms - diagnostic imaging | Image Processing, Computer-Assisted - methods | Lung Neoplasms - physiopathology | Cone-Beam Computed Tomography - methods | Phantoms, Imaging | CORRECTIONS | PATIENTS | ERRORS | NEOPLASMS | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | LUNGS | COMPUTERIZED TOMOGRAPHY | DEFORMATION | ACCURACY | IMAGE PROCESSING | MINIMIZATION | IMAGES | RADIOLOGY AND NUCLEAR MEDICINE | PHANTOMS | ITERATIVE METHODS
Journal Article