Optimized Camera-based Patient Positioning in CT

Optimized Camera-based Patient Positioning in CT: Impact on Radiation Exposure.

To evaluate the effect on radiation dose using intelligent camera positioning in comparison to manual positioning by the radiology assistant.

Study Overview

• Status: Completed
• Conditions: Radiation Dosage

Detailed Description

The positioning of the patient at the beginning of every CT examination has an major influence on the image quality and especially on the respective effective patient dose in the CT scan. If the patient position is closer to the X-ray tube, the patient dose increases significantly and if the vertical patient position is chosen too far away from the X-ray tube, the applied dose decreases, but also the image quality.

In a retrospective observational study, patients were examined on the CT scanner Somatom X.Cite and divided into two groups, one group was with intelligent camera positioning and the other with manual positioning.

The patients received their CT scan at the Institute Radiology and Nuclear Medicine at the Nuremberg North Hospital strictly according to the clinical indication and without influence of the study.

• Study Type: Observational
• Enrollment (Actual): 3118

Contacts and Locations

Study Locations

• Germany
  • Bavaria
    • Nuremberg, Bavaria, Germany, 90419
      • Institute of Radiology and Nuclear Medicine

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 100 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

patients of a primary care clinic

Description

Inclusion Criteria:

Only patients with a clinical indication for a CT Scan

Exclusion Criteria:

renal insufficiency, manifest hyperthyroidism and pregnancy

Study Plan

How is the study designed?

Design Details

• Observational Models: Case-Control
• Time Perspectives: Retrospective

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort
experimental group; patients positioned with 3D camera
control group; patients positioned by experienced radiology assistants

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Effective dose	the absorbed dose to different organs of the body	10 months

Collaborators and Investigators

• Sponsor: Dr. Panagiota Manava
• Investigators: Study Director: Michael M. Lell, Prof. Dr., Department of Radiology and Nuclear Medicine, Klinikum Nuernberg, Paracelsus Medical University, Germany

Publications and helpful links

General Publications

• Booij R, Budde RPJ, Dijkshoorn ML, van Straten M. Accuracy of automated patient positioning in CT using a 3D camera for body contour detection. Eur Radiol. 2019 Apr;29(4):2079-2088. doi: 10.1007/s00330-018-5745-z. Epub 2018 Oct 10.
• Kaasalainen T, Palmu K, Reijonen V, Kortesniemi M. Effect of patient centering on patient dose and image noise in chest CT. AJR Am J Roentgenol. 2014 Jul;203(1):123-30. doi: 10.2214/AJR.13.12028.
• Saltybaeva N, Schmidt B, Wimmer A, Flohr T, Alkadhi H. Precise and Automatic Patient Positioning in Computed Tomography: Avatar Modeling of the Patient Surface Using a 3-Dimensional Camera. Invest Radiol. 2018 Nov;53(11):641-646. doi: 10.1097/RLI.0000000000000482.
• Marsh RM, Silosky MS. The effects of patient positioning when interpreting CT dose metrics: A phantom study. Med Phys. 2017 Apr;44(4):1514-1524. doi: 10.1002/mp.12137. Epub 2017 Mar 17.
• Dane B, O'Donnell T, Liu S, Vega E, Mohammed S, Singh V, Kapoor A, Megibow A. Radiation dose reduction, improved isocenter accuracy and CT scan time savings with automatic patient positioning by a 3D camera. Eur J Radiol. 2021 Mar;136:109537. doi: 10.1016/j.ejrad.2021.109537. Epub 2021 Jan 12.
• Manava P, Galster M, Ammon J, Singer J, Lell MM, Rieger V. Optimized Camera-Based Patient Positioning in CT: Impact on Radiation Exposure. Invest Radiol. 2022 Aug 2. doi: 10.1097/RLI.0000000000000904. [Epub ahead of print]

Study record dates

Study Major Dates

• Study Start (Actual): February 1, 2021
• Primary Completion (Actual): May 24, 2022
• Study Completion (Actual): May 24, 2022

Study Registration Dates

• First Submitted: November 14, 2021
• First Submitted That Met QC Criteria: November 14, 2021
• First Posted (Actual): November 26, 2021

Study Record Updates

• Last Update Posted (Actual): September 1, 2022
• Last Update Submitted That Met QC Criteria: August 29, 2022
• Last Verified: August 1, 2022

More Information

Terms related to this study

• Other Study ID Numbers: CT_2021

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No