Patient-specific instruments (PSI) aim to improve the accuracy of total knee replacement (TKR) based on computer-assisted preoperative planning. In this work, the authors describe the advantages and pitfalls of PSI based on their clinical experience. The main conclusion of this work is that PSI has direct impact on the logistical and technical features of TKR with some advantages and pitfalls.

The checking of monitor unit calculations is recognized as a vital component of quality assurance in radiotherapy. Using straightforward but detailed computer-based verification calculations it is possible to achieve a precision of 1% when compared with a three-dimensional (3D) treatment planning system monitor unit calculation. The method is sufficiently sensitive to identify significant error...

Cervical cancer radiotherapy on the Linac aircraft uses a 6 MV energy photon beam with 3 Dimension Conformal Radiotherapy (3DCRT) and Intensity Modulation Radiation Therapy (IMRT) techniques. planning 3DCRT IMRT techniques is then compared by analyzing dose distribution or target volume (PTV) coverage through Conformity Index (CI) Homogeneity (HI) Organ At Risk (OAR) where risk organ that consi...

the aim of this study was to evaluate the efficacy of a computer - based training program of attention, memory and executive functions in enhancing neuropsychological performances as well as functional outcome in clients with schizophrenia.a total of 15 clinically stable out patients with diagnostic and statistical manual of mental disorders (dsm-iv-tr) criteria for schizophrenia, diagnosed wit...

1. student research committee, urmia university of medical sciences, urmia, iran 2. dept. of medical physics, faculty of medicine, urmia university of medical sciences, urmia, iran 3. dept. of radiology, faculty of medicine, imam khomeini hospital, urmia university of medical sciences, urmia, iran                             corresponding author: akbar gharbali, phd; assistant professor of medi...