Journal of Computer Aided Surgery Vol.8 No.1
J JSCAS vol.8, No.1, pp.9-17, 2006
Medical information including medical images are used for surgical navigation system, however, surgeon often encounter the difficulties to obtain a precise registration between pre-operative information and the patient. In this paper, we propose to apply ?augmented reality system” with a simple display device. It’s comprised of a 5.6 inch LCD, a half mirror, and a frameless positioning maker system. Through the half mirror, surgeon can observe the real patient and reflected image of the LCD, on which the navigation image are shown simultaneously at the right position loating inside the patient body to perform minimally invasive surgery. System precision including human perception error are evaluated using phantom experiments and the total result are 1.96?1.28mm and the pilot trial in the operating room are performed toward clinical use.
Key words
Augmented Reality Navigation, Image Overlay, semi-transparent mirror, optical tracking.
J JSCAS vol.8, No.1, pp.19-25, 2006
Abstract
Hip joint surgeries are commonplace in our aging society. In this paper a prototype of a muscle retracting
manipulator for minimally invasive RAO (Rotational Acetabular Osteotomy and one of the hip joint su rgeries)
is described. The muscle retracting manipulator’s role is to make a surgical space between muscles and the
surface of bone around hip joint for the other manipulator whose role is to cut bone. The mechanical structure
is very thin to follow narrow path and tough enough to peel muscles around hip joint. Pealing force of
periostea by using a raspatory (a onventional peeling tool of periostea) were measured as a preliminary
experiment. The prototype of the manipulator was composed from the result. Evaluation of the prototype was
done on a porcine iliac bone.
Key words: Rotational Acetabular Osteotomy, Manipulator, Minimally Invasive Surgery, Peeled soft tissues.
J JSCAS vol.8, No.1, pp.27-32, 2006
Abstract: N/A now
J JSCAS vol.8, No.1, pp.33-38, 2006
Abstract
During a surgical procedure, blood covering the surgical field hinders the surgeon’s visual inspection. We
propose a novel application of hyperspectral imagery in the biomedical field. We conceived a method to exploit
the capabilities of hyperspectral imaging systems in order to provide clearer images of areas covered by blood to
the surgeon. We developed a neural network approach to generate a nonlinear combination of spectral reflectance
bands in the near infrared region revealing images that could not be seeing in unprocessed images. The experimental
results are compared with conventional image processing techniques. We present in vitro experiments
using human blood and in situ experiments using guinea pigs to attest the validity of the proposed method.
Key words : Image-guided surgery, Infrared medical imaging, Hyperspectral imagery, Neural networks, Spectral manipulation.