Usability Assessment of an Intraoperative Planning Software

Two-dimensional (2D) planning on standard radiographs for total hip arthroplasty may not be sufficiently accurate to predict implant sizing or restore leg length and femoral offset, whereas 3D planning avoids magnification and projection errors. Furthermore, weightbearing measures are not available with computed tomography (CT) and leg length and offset are rarely checked postoperatively using any imaging modality. Navigation can usually achieve a surgical plan precisely, but the choice of that plan remains key, which is best guided by preoperative planning. The study objectives were therefore to (1) evaluate the accuracy of stem/cup size prediction using dedicated 3D planning software based on biplanar radiographic imaging under weightbearing and (2) compare the preplanned leg length and femoral offset with the postoperative result. This single-centre, single-surgeon prospective study consisted of a cohort of 33 patients operated on over 24 months. The routine clinical workflow consisted of preoperative biplanar weightbearing imaging, 3D surgical planning, navigated surgery to execute the plan, and postoperative biplanar imaging to verify the radiological outcomes in 3D weightbearing. 3D planning was performed with the dedicated hipEOS® planning software to determine stem and cup size and position, plus 3D anatomical and functional parameters, in particular variations in leg length and femoral offset. Component size planning accuracy was 94% (31/33) within one size for the femoral stem and 100% (33/33) within one size for the acetabular cup. There were no significant differences between planned versus implanted femoral stem size or planned versus measured changes in leg length or offset. Cup size did differ significantly, tending towards implanting one size larger when there was a difference. Biplanar radiographs plus hipEOS planning software showed good reliability for predicting implant size, leg length, and femoral offset and postoperatively provided a check on the navigated surgery. Compared to previous studies, the predictive results were better than 2D planning on conventional radiography and equal to 3D planning on CT images, with lower radiation dose, and in the weightbearing position.

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Usability assessment of compaction operator support systems using virtual prototyping

Automation in Construction ◽

10.1016/j.autcon.2021.103784 ◽

2021 ◽

Vol 129 ◽

pp. 103784

Author(s):

Denis Makarov ◽

Faridaddin Vahdatikhaki ◽

Seirgei Miller ◽

Sajjad Mowlaei ◽

André Dorée

Keyword(s):

Support Systems ◽

Virtual Prototyping ◽

Usability Assessment

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Maxillary expansion or contraction and occlusal contact adjustment: effectiveness of current aligner treatment

Clinical Oral Investigations ◽

10.1007/s00784-021-03780-4 ◽

2021 ◽

Author(s):

Ulrike Riede ◽

Sandra Wai ◽

Sabrina Neururer ◽

Bärbel Reistenhofer ◽

Gregor Riede ◽

...

Keyword(s):

Clinical Outcomes ◽

Measuring Method ◽

Rank Test ◽

Treatment Goals ◽

Maxillary Expansion ◽

Clinical Model ◽

Occlusal Contact ◽

Planning Software ◽

Signed Rank ◽

Signed Rank Test

Abstract Objectives To evaluate the precision of aligner (Invisalign®) treatment with the current material (SmartTrack®) in achieving expansion or contraction of the maxilla and occlusal contacts as simulated in the proprietary planning software (ClinCheck®, CC). Materials and methods Thirty patients thus treated were retrospectively evaluated. Four maxillary models were analyzed per patient: a pretreatment model, a scan-based CC model, a posttreatment clinical model, and a CC model reflecting the treatment outcome as initially simulated. Thirteen transverse parameters were measured on each model separately by two investigators. Occlusal contacts were also analyzed. Results The measuring method was validated by both investigators arriving at similar results for the effectiveness by which the simulated treatment goals had been clinically achieved. Significant differences (p < 0.05; Wilcoxon signed-rank test) were observed for transfer precision from the casts to the planning software and between the simulated and clinical outcomes. Intense occlusal contacts in the simulations materialized less common (≈ 2%) than ideal contacts (≈ 60%) in the clinical outcomes. Conclusions The effectiveness of achieving the simulated transverse goals was 45% and was generally not found to be better with SmartTrack® than with the previously used Ex30® material. Out of 100 simulated occlusal contacts, 40 will never materialize, and achieving around 60 will adequately ensure a clinically favorable contact pattern. Clinical relevance With the caveat that any overcorrection will to some extent reduce the precision, it seems perfectly possible to make deliberate use of overcorrection in current aligner therapies for transverse maxillary expansion or contraction.

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Assessing the performance of an automated breast treatment planning software

Journal of Applied Clinical Medical Physics ◽

10.1002/acm2.13228 ◽

2021 ◽

Vol 22 (4) ◽

pp. 115-120

Author(s):

Irena Dragojević ◽

Jeremy D. P. Hoisak ◽

Gina J. Mansy ◽

Douglas A. Rahn ◽

Ryan P. Manger

Keyword(s):

Treatment Planning ◽

Planning Software

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Increasing Usability of Homecare Applications for Older Adults: A Case Study

Designs ◽

10.3390/designs3020023 ◽

2019 ◽

Vol 3 (2) ◽

pp. 23 ◽

Cited By ~ 4

Author(s):

Christos Panagopoulos ◽

Andreas Menychtas ◽

Panayiotis Tsanakas ◽

Ilias Maglogiannis

Keyword(s):

Emergency Response ◽

Independent Living ◽

The Elderly ◽

Usability Assessment ◽

Technological Advances ◽

System Usability Scale ◽

System Usability ◽

Practical Guidelines ◽

Depth Interviews

As the world’s population is ageing, the field dealing with technology adoption by seniors has made headway in the scientific community. Recent technological advances have enabled the development of intelligent homecare systems that support seniors’ independent living and allow monitoring of their health status. However, despite the amount of research to understand the requirements of systems designed for the elderly, there are still unresolved usability issues that often prevent seniors from enjoying the benefits that modern ICT technologies may offer. This work presents a usability assessment of “HeartAround”, an integrated homecare solution incorporating communication functionalities, as well as health monitoring and emergency response features. An assessment with the system usability scale (SUS) method, along with in-depth interviews and qualitative analysis, has provided valuable insights for designing homecare systems for seniors, and validated some effective practical guidelines.

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A Virtual Reality System for Pre-Planning of Robotic-Assisted Prostate Biopsy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.772.585 ◽

2015 ◽

Vol 772 ◽

pp. 585-590

Author(s):

Florin Gîrbacia ◽

Silviu Butnariu ◽

Daniel Voinea ◽

Bogdan Tzolea ◽

Teodora Gîrbacia ◽

...

Keyword(s):

Virtual Reality ◽

Virtual Environment ◽

Virtual Reality System ◽

Surgical Robots ◽

Robotic Assisted ◽

Biopsy Procedure ◽

Planning Software ◽

Operative Planning ◽

Serial Robot ◽

Needle Trajectory

Surgical robots for biopsy procedure require pre-operative planning of trajectories prior to be used for needle guiding procedures. Virtual Reality (VR) technologies allow to simulate robotic biopsy procedure and to generate accurate needle trajectories that avoid vital organs. The paper presents a serial robot which can be used for biopsy procedure and a needle trajectory planning software based on VR technologies. A virtual environment has been modelled and simulations for robotic-assisted biopsy of the prostate have been performed.

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