Knowledge-based iterative model reconstruction technique in computed tomography of lumbar spine lowers radiation dose and improves tissue differentiation for patients with lower back pain

Autor: Yi You Chiou, Ming Huei Sheu, Tung Hsin Wu, Chen Fen Chiu, Wan-Yuo Guo, Cheng Hui Yang, Ying Chou Chen, Chung Jung Lin
Rok vydání: 2016
Předmět:
musculoskeletal diseases
Adult
Male
medicine.medical_specialty
Spinal stenosis
Iterative reconstruction
Lumbar vertebrae
Signal-To-Noise Ratio
030218 nuclear medicine & medical imaging
Facet joint
03 medical and health sciences
0302 clinical medicine
Contrast-to-noise ratio
Image Processing
Computer-Assisted
Medicine
Humans
Radiology
Nuclear Medicine and imaging
Prospective Studies
Intervertebral foramen
Aged
Aged
80 and over
Observer Variation
Lumbar Vertebrae
business.industry
Patient Selection
Reproducibility of Results
General Medicine
Middle Aged
musculoskeletal system
medicine.disease
Low back pain
medicine.anatomical_structure
Radiographic Image Interpretation
Computer-Assisted
Female
Spinal Diseases
Radiology
Tomography
medicine.symptom
business
Tomography
X-Ray Computed
Low Back Pain
030217 neurology & neurosurgery
Algorithms
Zdroj: European journal of radiology. 85(10)
ISSN: 1872-7727
Popis: Purpose To evaluate the image quality and diagnostic confidence of reduced-dose computed tomography (CT) of the lumbar spine (L-spine) reconstructed with knowledge-based iterative model reconstruction (IMR). Materials and methods Prospectively, group A consisted of 55 patients imaged with standard acquisition reconstructed with filtered back-projection. Group B consisted of 58 patients imaged with half tube current, reconstructed with hybrid iterative reconstruction (iDose 4 ) in Group B1 and knowledge-based IMR in Group B2. Signal-to-noise ratio (SNR) of different regions, the contrast-to-noise ratio between the intervetebral disc (IVD) and dural sac (D-D CNR), and subjective image quality of different regions were compared. Higher strength IMR was also compared in spinal stenosis cases. Results The SNR of the psoas muscle and D-D CNR were significantly higher in the IMR group. Except for the facet joint, subjective image quality of other regions including IVD, intervertebral foramen (IVF), dural sac, peridural fat, ligmentum flavum, and overall diagnostic acceptability were best for the IMR group. Diagnostic confidence of narrowing IVF and IVD was good (kappa = 0.58–0.85). Higher strength IMR delineated IVD better in spinal stenosis cases. Conclusion Lower dose CT of L-spine reconstructed with IMR demonstrates better tissue differentiation than iDose 4 and standard dose CT with FBP.
Databáze: OpenAIRE
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