Journal of Computer Aided Surgery Vol.2No.2
Abstract
The impact of Computer−Integrated Surgery（CIS）on medicine in the next 20years will be as great as that of Computer．Integrated Manufacturing on industrial production over the past 20years.Development of advanced CIS systems is best pursued within the context of systems−oriented multidisciplinary research providing close collaboration between engineering faculty，Students，Surgeons，andindustry．This paper intr0duces basic themes of CIS systems and describes the overall research strategy pursued within our NSF Engineering Research Center for Computer−Integrated Surgery．We illustrate key concepts with examples drawn from our research．
Abstract
Camera work of the laparoscopic surgery was performed in 10cases of
laparoscopic cholecystectomy．The camera work was classified into 4 kinds
of motion，“zoom “（in and out），“tilt"（up and down），“Pan”（right
and left）and“search"． Also the size of the camera view was classified
into“long−shot”，“median−shot”and”close−up"．Frequency of
the camera work were“zoom”64.4times・C”tilt"11．9times，“Pan"11．5times
and ”search”4times during the laparoscopic procedure．The time ratio
of the size of camera view were”long−shot”9．5％，“median−shot”67．3％and“close−up"19．4％．This
study revealed that laparoscopic cholecystectomy requires mainly”zoom"function
of the laparoscope and”median”size of view.
Keywords
Laparoscopic surgery，Camera work，Industrial engineering．
Abstract
Virtual endoscopy is a new method of diagnosis using computer processing
of 3−D image data sets．However clinical application of virtual pancreatoscopy
for pancreatic cancer has not been reported. In this study，the usefulness
of virtual pancreatoscopy for pancreatic cancer was investigated．Twenty
cases of pancreatic cancer were studied．Seven patients underwent pancreatectomy
at National Cancer Center Hospital East from June to November in1999．The
MRI data were acquired with a 1.5−T clinical imager．A multislab single
shot fast spin echo sequence was used．Section thickness was between 2
and 3 mm in the coronal plane．Virtual endoscopic images were generated
with Advantage Windows system （G．E・U．S．A．）.Clear virtual endoscopic
images were obtained in 15 of 20 patients with panceratic cancer.It was
possible to visualize partial or complete obstruction of the panceatic
duct.And we could get endoscopic views from the side of pancreatictail.Virtual
pancreatoscopy is noninvasive and easy to generate.Viutual pancreatoscopy
can provide the information that we cannot obtain by the real pancreatoscopy.It
will be veryuseful to diagnose pancreatic cancer.
Keywords
Virtual endoscopy，Virtual panceatoscopy，Pancreatic cancer．
Abstract
Endoscope is one of the important tools in minimal invasive surgery．The
field−of−view（FOV）of the endoscope is，however，quite limited．Improvident
operations of the endoscope can resultin missing important anatomical landmarks
or lesions.Using image processing and computer graphics techniques，We
have developed a virtual expansion system of the endoscopic view.A peripheral
area of the endoscopic image is continuously digitized and memorized．This
series of memorized images is then seamlessly displayedoutside the live
image.We used two visualization methods，'static real'FOV'and'dynamic real−FOV'
for real endoscopic images.Oursystem is applicable to any kind of optical
instruments for surgical use to assist the surgeon's visual cognition．
Keywords
Endoscope，FOV,Image processing．