Water transport model during CAPD: Determination of parameters

Water transport model during CAPD: Determination of parameters. To minimize the total amount of glucose required for removing the same volume of water as a bolus, a continuous infusion of glucose during CAPD was proposed and studied. Both a computer simulation of water transport through the peritoneal membrane and in vivo assessment with rats were carried out to evaluate the feasibility of the newly proposed mathematical model in which lymphatic drainage of dialysate from the peritoneal cavity to lymphatic system was considered in addition to conventional water transport. Mass transport area coefficients (KA) of 0.041 to 0.063 ml/min/100 g body wt and 0.045 to 0.066 ml/min/100 g body wt were measured for glucose and urea during CAPD with male Wistar rats. Hydraulic conductivity of peritoneal membrane (Lc) was 7.9 × 10-5 to 1.5 × 10-4 ml/min/mm Hg/100 g body wt, which was calculated by a linear relationship between volume and osmotic pressure. Simulated water transport model using determined parameters indicated that the ratio of lymphatic transport to convective transport would be changeable in CAPD with glucose infusion at varying infusion rates, while up to 16% of the glucose uptake could be reduced compared with that of the common CAPD at the same dwell time

Projection Profile Matching for Intraoperative MRI Registration embedded in MR imaging sequence

Abstract. Fast image registration for magnetic resonance image (MRI)-guided surgery using projection profile matching embedded in MR pulse sequence is proposed. The method can perform two-dimensional image registration by matching projection profiles acquired with zero-degree phase encoding. The matching process continuously measures displacement by optimizing cross correlation value from profiles acquired 64 times by a special pulse excitation and echo acquisition in one imaging cycle. A phantom experiment concluded that the method can perform the registration in 25ms with the accuracy of 0.50mm out of 100mm field of view. The paper also includes in-vivo experiment to registration MRI arm in motion. Unlike previously reported image registration by post-processing, the method is suitable in intraoperative setting where fast registration is in great need

Navigation System for ACL Reconstruction Using Registration between Multi-Viewpoint X-ray Images and CT Images

"Navigation system for ACL reconstruction using registration between multi-viewpoint X-ray images and CT images", in Proc. of the 18th International Congress and Exhibitio