scholarly journals A patient-specific approach for quantitative and automatic analysis of computed tomography images in lung disease: Application to COVID-19 patients

2021 ◽  
Vol 82 ◽  
pp. 28-39
Author(s):  
L. Berta ◽  
C. De Mattia ◽  
F. Rizzetto ◽  
S. Carrazza ◽  
P.E. Colombo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Lung Disease ◽  
Automatic Analysis ◽  
Patient Specific ◽  
Specific Approach ◽  
Computed Tomography Images

scholarly journals Development of patient specific, realistic, and reusable video assisted thoracoscopic surgery simulator using 3D printing and pediatric computed tomography images

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dayeong Hong ◽  
HaeKang Kim ◽  
Taehun Kim ◽  
Yong-Hee Kim ◽  
Namkug Kim
Keyword(s):  
Computed Tomography ◽  
Mechanical Properties ◽  
Fused Deposition Modeling ◽  
Thoracoscopic Surgery ◽  
Clinical Situation ◽  
Patient Specific ◽  
Fused Deposition ◽  
Video Assisted ◽  
Computed Tomography Images ◽  
Video Assisted Thoracoscopic Surgery

AbstractHerein, realistic and reusable phantoms for simulation of pediatric lung video-assisted thoracoscopic surgery (VATS) were proposed and evaluated. 3D-printed phantoms for VATS were designed based on chest computed tomography (CT) data of a pediatric patient with esophageal atresia and tracheoesophageal fistula. Models reflecting the patient-specific structure were fabricated based on the CT images. Appropriate reusable design, realistic mechanical properties with various material types, and 3D printers (fused deposition modeling (FDM) and PolyJet printers) were used to represent the realistic anatomical structures. As a result, the phantom printed by PolyJet reflected closer mechanical properties than those of the FDM phantom. Accuracies (mean difference ± 95 confidence interval) of phantoms by FDM and PolyJet were 0.53 ± 0.46 and 0.98 ± 0.55 mm, respectively. Phantoms were used by surgeons for VATS training, which is considered more reflective of the clinical situation than the conventional simulation phantom. In conclusion, the patient-specific, realistic, and reusable VATS phantom provides a better understanding the complex anatomical structure of a patient and could be used as an educational phantom for esophageal structure replacement in VATS.

scholarly journals Special Convolutional Neural Network for Identification and Positioning of Interstitial Lung Disease Patterns in Computed Tomography Images

2021 ◽  
Vol 31 (4) ◽  
pp. 730-738
Author(s):  
Sunita Agarwala ◽  
Abhishek Kumar ◽  
Ashis Kumar Dhara ◽  
Sumitra Basu Thakur ◽  
Anup Sadhu ◽  
...  
Keyword(s):  
Neural Network ◽  
Computed Tomography ◽  
Interstitial Lung Disease ◽  
Convolutional Neural Network ◽  
Lung Disease ◽  
Disease Patterns ◽  
Computed Tomography Images

Extraction of the subpleural lung region from computed tomography images to detect interstitial lung disease

2017 ◽  
Vol 35 (11) ◽  
pp. 681-688 ◽  
Author(s):  
Tae Iwasawa ◽  
Yuma Iwao ◽  
Tamiko Takemura ◽  
Koji Okudela ◽  
Toshiyuki Gotoh ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Interstitial Lung Disease ◽  
Lung Disease ◽  
Lung Region ◽  
Computed Tomography Images

scholarly journals Computer-Aided Quantification of Interstitial Lung Disease from High Resolution Computed Tomography Images in Systemic Sclerosis: Correlation with Visual Reader-Based Score and Physiologic Tests

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Fausto Salaffi ◽  
Marina Carotti ◽  
Silvia Bosello ◽  
Alessandro Ciapetti ◽  
Marwin Gutierrez ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Systemic Sclerosis ◽  
High Resolution ◽  
Interstitial Lung Disease ◽  
Lung Disease ◽  
Pulmonary Function Tests ◽  
Linear Regression Analysis ◽  
Receiver Operating Curve ◽  
High Resolution Computed Tomography ◽  
Computed Tomography Images

Objective.To evaluate the performance of a computerized-aided method (CaM) for quantification of interstitial lung disease (ILD) in patients with systemic sclerosis and to determine its correlation with the conventional visual reader-based score (CoVR) and the pulmonary function tests (PFTs).Methods.Seventy-nine patients were enrolled. All patients underwent chest high resolution computed tomography (HRCT) scored by two radiologists adopting the CoVR. All HRCT images were then analysed by a CaM using a DICOM software. The relationships among the lung segmentation analysis, the readers, and the PFTs results were calculated using linear regression analysis and Pearson’s correlation. Receiver operating curve analysis was performed for determination of CaM extent threshold.Results.A strong correlation between CaM and CoVR was observed (P<0.0001). The CaM showed a significant negative correlation with forced vital capacity (FVC) (P<0.0001) and the single breath carbon monoxide diffusing capacity of the lung (DLco) (P<0.0001). A CaM optimal extent threshold of 20% represented the best compromise between sensitivity (75.6%) and specificity (97.4%).Conclusions.CaM quantification of SSc-ILD can be useful in the assessment of extent of lung disease and may provide reliable tool in daily clinical practice and clinical trials.

Patient-specific lean body mass can be estimated from limited-coverage computed tomography images

2018 ◽  
Vol 39 (6) ◽  
pp. 521-526
Author(s):  
Joke Devriese ◽  
Laurence Beels ◽  
Alex Maes ◽  
Christophe van de Wiele ◽  
Hans Pottel
Keyword(s):  
Computed Tomography ◽  
Lean Body Mass ◽  
Body Mass ◽  
Patient Specific ◽  
Computed Tomography Images ◽  
Limited Coverage

Computed Tomography-Based Patient-Specific Instrumentation Loses Accuracy with Significant Varus Preoperative Misalignment

2020 ◽  
Author(s):  
Vicente Jesús León-Muñoz ◽  
Mirian López-López ◽  
Alonso José Lisón-Almagro ◽  
Francisco Martínez-Martínez ◽  
Fernando Santonja-Medina
Keyword(s):  
Computed Tomography ◽  
Deformity Correction ◽  
Patient Specific ◽  
Control Group ◽  
X Rays ◽  
Varus Alignment ◽  
Patient Specific Instrumentation ◽  
Conventional Instrumentation ◽  
The Mean ◽  
Valgus Alignment

AbstractPatient-specific instrumentation (PSI) has been introduced to simplify and make total knee arthroplasty (TKA) surgery more precise, effective, and efficient. We performed this study to determine whether the postoperative coronal alignment is related to preoperative deformity when computed tomography (CT)-based PSI is used for TKA surgery, and how the PSI approach compares with deformity correction obtained with conventional instrumentation. We analyzed pre-and post-operative full length standing hip-knee-ankle (HKA) X-rays of the lower limb in both groups using a convention > 180 degrees for valgus alignment and < 180 degrees for varus alignment. For the PSI group, the mean (± SD) pre-operative HKA angle was 172.09 degrees varus (± 6.69 degrees) with a maximum varus alignment of 21.5 degrees (HKA 158.5) and a maximum valgus alignment of 14.0 degrees. The mean post-operative HKA was 179.43 degrees varus (± 2.32 degrees) with a maximum varus alignment of seven degrees and a maximum valgus alignment of six degrees. There has been a weak correlation among the values of the pre- and postoperative HKA angle. The adjusted odds ratio (aOR) of postoperative alignment outside the range of 180 ± 3 degrees was significantly higher with a preoperative varus misalignment of 15 degrees or more (aOR: 4.18; 95% confidence interval: 1.35–12.96; p = 0.013). In the control group (conventional instrumentation), this loss of accuracy occurs with preoperative misalignment of 10 degrees. Preoperative misalignment below 15 degrees appears to present minimal influence on postoperative alignment when a CT-based PSI system is used. The CT-based PSI tends to lose accuracy with preoperative varus misalignment over 15 degrees.

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