User-interactive registration of bone with A-mode ultrasound

Heger, Stefan; Portheine, F.; Ohnsorge, J. A. K.; Schkommodau, Erik; Radermacher, Klaus

doi:10.1109/memb.2005.1411353

Cited by 25 publications

(29 citation statements)

References 15 publications

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“…In contrast, surface based methods may be inaccurate as far as registration is restricted to the very limited bone surface area of the surgical approach. Using a transcutaneous A-mode ultrasound (US) registration of anatomic landmarks and surface areas underneath the soft tissue may be a solution overcoming displacement problems without increasing the invasiveness (Mauerer 1999et al, Heger et al 2005. Furthermore, the ultrasonic registration avoids the need for the preoperative segmentation of the markers.…”

Section: Registration Techniquesmentioning

confidence: 99%

“…Furthermore, the ultrasonic registration avoids the need for the preoperative segmentation of the markers. The approach to achieve a time efficient and robust registration by a combination of an optimized man-machineinteraction strategy, signal processing and different registration techniques has been reported in detail in (Heger et al 2005). Its application in skull surgery is presented here.…”

Section: Registration Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Efficient Non-Invasive Registration with A-Mode Ultrasound in Skull Surgery

Popović¹,

Heger²,

Follmann³

et al. 2008

Medical Robotics

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Section: Registration Techniquesmentioning

confidence: 99%

Section: Registration Techniquesmentioning

confidence: 99%

Efficient Non-Invasive Registration with A-Mode Ultrasound in Skull Surgery

Popović¹,

Heger²,

Follmann³

et al. 2008

Medical Robotics

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“…An accuracy with a mean deviation of 0.58 mm was achieved. 8,9 Using b-mode ultrasound, Amin and colleagues achieved a mean accuracy below 1 mm in a pelvic model and below 2 mm in patients ( Table 2). 10 One of the key attributes of computer-assisted surgery is that it increases accuracy of surgical interventions.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of navigated surgery of the pelvis after surface matching with an a‐mode ultrasound probe

Oszwald¹,

Citak²,

Kendoff³

et al. 2008

Journal Orthopaedic Research

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Computer-aided surgery (CAS) allows for real-time intraoperative feedback resulting in increased accuracy, while reducing intraoperative radiation. CAS is especially useful for the treatment of certain pelvic ring fractures, which necessitate the precise placement of screws. Flouroscopy-based CAS modules have been developed for many orthopedic applications. The integration of the isocentric flouroscope even enables navigation using intraoperatively acquired three-dimensional (3D) data, though the scan volume and imaging quality are limited. Complicated and comprehensive pathologies in regions like the pelvis can necessitate a CT-based navigation system because of its larger field of view. To be accurate, the patient's anatomy must be registered and matched with the virtual object (CT data). The actual precision within the region of interest depends on the area of the bone where surface matching is performed. Conventional surface matching with a solid pointer requires extensive soft tissue dissection. This contradicts the primary purpose of CAS as a minimally invasive alternative to conventional surgical techniques. We therefore integrated an a-mode ultrasound pointer into the process of surface matching for pelvic surgery and compared it to the conventional method. Accuracy measurements were made in two pelvic models: a foam model submerged in water and one with attached porcine muscle tissue. Three different tissue depths were selected based on CT scans of 30 human pelves. The ultrasound pointer allowed for registration of virtually any point on the pelvis. This method of surface matching could be successfully integrated into CAS of the pelvis. ß

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“…The distance from the transducer to the bone surface is calculated by d = 1/2 c t, where d is the distance, c is the velocity of sound, and t is the Time of Flight (TOF) between the pulse generation and the detection of the echo. Typical value for sound velocity in human soft tissue varies between 1450-1630 m/s 15 .…”

Section: Us Hardwarementioning

confidence: 99%

“…They were also used for transcutaneous palpation of points for THR procedures 15 and for detecting intra-femoral bone cement and 3D reconstruction in hip revision operations 16 . A-mode systems avoid US images segmentation, offer real-time signal processing and require less invasive equipment.…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of A-mode ultrasound acquisition system for computer assisted orthopaedic surgery

et al. 2009

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Computer Assisted Orthopaedic Surgery (CAOS) systems improve the results and the standardization of surgical interventions. Anatomical landmarks and bone surface detection is straightforward to either register the surgical space with the pre-operative imaging space and to compute biomechanical parameters for prosthesis alignment.Surface points acquisition increases the intervention invasiveness and can be influenced by the soft tissue layer interposition (7-15mm localization errors).This study is aimed at evaluating the accuracy of a custom-made A-mode ultrasound (US) system for non invasive detection of anatomical landmarks and surfaces. A-mode solutions eliminate the necessity of US images segmentation, offers real-time signal processing and requires less invasive equipment. The system consists in a single transducer US probe optically tracked, a pulser/receiver and an FPGA-based board, which is responsible for logic control command generation and for real-time signal processing and three custom-made board (signal acquisition, blanking and synchronization).We propose a new calibration method of the US system. The experimental validation was then performed measuring the length of known-shape polymethylmethacrylate boxes filled with pure water and acquiring bone surface points on a bovine bone phantom covered with soft-tissue mimicking materials. Measurement errors were computed through MR and CT images acquisitions of the phantom. Points acquisition on bone surface with the US system demonstrated lower errors (1.2mm) than standard pointer acquisition (4.2mm).

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User-interactive registration of bone with A-mode ultrasound

Cited by 25 publications

References 15 publications

Efficient Non-Invasive Registration with A-Mode Ultrasound in Skull Surgery

Efficient Non-Invasive Registration with A-Mode Ultrasound in Skull Surgery

Accuracy of navigated surgery of the pelvis after surface matching with an a‐mode ultrasound probe

Experimental validation of A-mode ultrasound acquisition system for computer assisted orthopaedic surgery

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