A miniature accelerometer-based guidance device for percutaneous computed tomography-guided punctures

Christoph Wilkmann, Nobutake Ito, Tobias Penzkofer, Peter Isfort, Hong Sik Na, Michael Hennes, Catherine Disselhorst-Klug, Andreas H. Mahnken, Christiane K. Kuhl, Philipp Bruners

Research output: Contribution to journalArticle

Abstract

Purpose: Percutaneous punctures are often performed under computed tomography (CT) guidance using a freehand method. Especially in challenging cases, initial accuracy of the needle placement is highly dependent on the radiologist’s experience. Thus, a miniature lightweight guidance device was developed which is capable of assisting a radiologist during the needle placement process.Methods: The device utilizes an accelerometer to measure the needle’s tilt by calculating a set of orientation angles. This set can be matched with the coordinate system of the CT imaging software during a simple alignment process. After that, the needle’s orientation can be expressed in terms of projected angles in the axial and sagittal planes. The accuracy of the device was evaluated in a phantom study, and initial clinical trials were carried out performing facet joint punctures in a swine cadaver.Results: The sensor was embedded in a cube with dimensions of 2cm×2cm×2cm and a total weight of about 11 g which can be attached to the puncture needle at its rear end or handgrip. A graphical user interface (GUÌ) has been created offering visual real-time orientation guidance. Results of the phantom experiments showed differences between planned target and performed puncture angles of 0.96∘±0.76∘ for in-plane and 1.78∘±1.37∘ for out-of-plane punctures.Conclusion:  The results of the phantom and ex vivo study suggest that the device is useful to assist a radiologist in CT-guided percutaneous punctures and helps navigating the needle with high precision.

Original languageEnglish
Pages (from-to)629-636
Number of pages8
JournalInternational journal of computer assisted radiology and surgery
Volume10
Issue number5
DOIs
Publication statusPublished - 2015 May 1

Fingerprint

Accelerometers
Punctures
Needles
Tomography
Equipment and Supplies
Zygapophyseal Joint
Graphical user interfaces
Cadaver
Swine
Software
Clinical Trials
Imaging techniques
Weights and Measures
Sensors
Radiologists
Experiments

Keywords

  • Accelerometers
  • Assistive devices
  • Computed tomography
  • CT-guided intervention
  • Real-time systems

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Health Informatics
  • Surgery
  • Medicine(all)

Cite this

A miniature accelerometer-based guidance device for percutaneous computed tomography-guided punctures. / Wilkmann, Christoph; Ito, Nobutake; Penzkofer, Tobias; Isfort, Peter; Na, Hong Sik; Hennes, Michael; Disselhorst-Klug, Catherine; Mahnken, Andreas H.; Kuhl, Christiane K.; Bruners, Philipp.

In: International journal of computer assisted radiology and surgery, Vol. 10, No. 5, 01.05.2015, p. 629-636.

Research output: Contribution to journalArticle

Wilkmann, C, Ito, N, Penzkofer, T, Isfort, P, Na, HS, Hennes, M, Disselhorst-Klug, C, Mahnken, AH, Kuhl, CK & Bruners, P 2015, 'A miniature accelerometer-based guidance device for percutaneous computed tomography-guided punctures', International journal of computer assisted radiology and surgery, vol. 10, no. 5, pp. 629-636. https://doi.org/10.1007/s11548-014-1096-7
Wilkmann, Christoph ; Ito, Nobutake ; Penzkofer, Tobias ; Isfort, Peter ; Na, Hong Sik ; Hennes, Michael ; Disselhorst-Klug, Catherine ; Mahnken, Andreas H. ; Kuhl, Christiane K. ; Bruners, Philipp. / A miniature accelerometer-based guidance device for percutaneous computed tomography-guided punctures. In: International journal of computer assisted radiology and surgery. 2015 ; Vol. 10, No. 5. pp. 629-636.
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