+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

A systematic procedure to optimise dose and image quality for the measurement of inter-vertebral angles from lateral spinal projections using Cobb and superimposition methods

A systematic procedure to optimise dose and image quality for the measurement of inter-vertebral angles from lateral spinal projections using Cobb and superimposition methods

Journal of X-Ray Science and Technology 22(5): 613-625

Patients with vertebral column deformations are exposed to high risks associated with ionising radiation exposure. Risks are further increased due to the serial X-ray images that are needed to measure and asses their spinal deformation using Cobb or superimposition methods. Therefore, optimising such X-ray practice, via reducing dose whilst maintaining image quality, is a necessity. With a specific focus on lateral thoraco-lumbar images for Cobb and superimposition measurements, this paper outlines a systematic procedure to the optimisation of X-ray practice. Optimisation was conducted based on suitable image quality from minimal dose. Image quality was appraised using a visual-analogue-rating-scale, and Monte-Carlo modelling was used for dose estimation. The optimised X-ray practice was identified by imaging healthy normal-weight male adult living human volunteers. The optimised practice consisted of: anode towards the head, broad focus, no OID or grid, 80 kVp, 32 mAs and 130 cm SID. Images of suitable quality for laterally assessing spinal conditions using Cobb or superimposition measurements were produced from an effective dose of 0.05 mSv, which is 83% less than the average effective dose used in the UK for lateral thoracic/lumbar exposures. This optimisation procedure can be adopted and use for optimisation of other radiographic techniques.

(PDF emailed within 0-6 h: $19.90)

Accession: 051271270

Download citation: RISBibTeXText

PMID: 25265922

DOI: 10.3233/XST-140449

Related references

Inter- and intra-observer reliability of the Cobb angle in the measurement of vertebral, local and segmental kyphosis of traumatic lumbar spine fractures in the lateral X-ray. Archives of Orthopaedic and Trauma Surgery 130(12): 1533-1538, 2011

An inter-laboratory comparison study of image quality of PET scanners using the NEMA NU 2-2001 procedure for assessment of image quality. Physics in Medicine and Biology 50(10): 2193-2207, 2005

Intra- and inter-observer reliability of the Cobb measurement by chiropractic interns using digital evaluation methods. Journal of the Canadian Chiropractic Association 59(3): 261-268, 2015

The intermediate spinal nerve rami and the lateral inter vertebral muscles. Acta Anatomica Nipponica 48(6): 403-404, 1973

Evaluating phantom image quality parameters to optimise patient radiation dose in dental digital radiology. Radiation Protection Dosimetry 151(1): 95-101, 2012

Radiographic measures of thoracic kyphosis in osteoporosis: Cobb and vertebral centroid angles. Skeletal Radiology 36(8): 761-767, 2007

A comparison of manual versus computer-assisted radiographic measurement. Intraobserver measurement variability for Cobb angles. Spine 23(5): 551-555, 1998

A comparison of traditional protractor versus Oxford Cobbometer radiographic measurement: intraobserver measurement variability for Cobb angles. Spine 30(4): 440-443, 2005

Does lateral vertebral translation correspond to Cobb angle and relate in the same way to axial vertebral rotation and rib hump index? A radiographic analysis on idiopathic scoliosis. European Spine Journal 20(7): 1095-1105, 2012

Comparison between clinical Cobb angles and measurements performed on vertebral bodies, pedicle centroids and spinous processes. Annales de Chirurgie 53(8): 792-797, 1999

Anteroposterior and lateral spinal DXA for the assessment of vertebral body strength: comparison with hip and forearm measurement. Osteoporosis International 6(1): 37-42, 1996

Comparison of Cobb angles measured manually, calculated from 3-D spinal reconstruction, and estimated from torso asymmetry. Computer Methods in Biomechanics and Biomedical Engineering 5(4): 277-281, 2002

Improved lateral cephalometric superimposition using an automated image fitting technique. Angle Orthodontist 80(3): 474-479, 2010

Optimization of dose and image quality of paediatric cardiac catheterization procedure. Physica Medica 31(7): 659-668, 2016

Dose and image quality. How does the choice of kilovoltage affect patient dose, scattered radiation, and image quality in CT examinations? Submitted by Glen Thomson, Middlemore Hospital, New Zealand. Pediatric Radiology 34(2): 185, 2003