A novel technique to measure severity of pediatric pectus excavatum using white light scanning.

Hebal, Ferdynand; Port, Elissa; Hunter, Catherine J.; Malas, Bryan S.; Green, Jared; Reynolds, Marleta

doi:10.1016/j.jpedsurg.2018.04.017

Cited by 22 publications

(17 citation statements)

References 16 publications

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“…In addition, the cost and limited availability of these scanners have limited their applicability and utilization in the general population. 6,[15][16][17] PED is an efficacious tool that can be implemented at the bedside in any setting. Asymmetric defects and female breast tissue have also been discussed as possible challenges to measuring PED.…”

Section: Discussionmentioning

confidence: 99%

“…Asymmetric defects and female breast tissue have also been discussed as possible challenges to measuring PED. 5,15,18 With asymmetric defects, we recommend ensuring that the PED is measured at a perpendicular angle to the straight edge that is lying across the patient's chest. The asymmetry should not affect the validity of PED when measured appropriately, as the defect poses the same challenge when calculating HI and CI after CT.…”

Section: Discussionmentioning

confidence: 99%

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Physician-Estimated Depth as a Screening Tool for Computed Tomography Evaluation of Pectus Excavatum

Jacobson

Postma

Mokdad

et al. 2020

Journal of Surgical Research

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Physician-Estimated Depth as a Screening Tool for Computed Tomography Evaluation of Pectus Excavatum

Jacobson

Postma

Mokdad

et al. 2020

Journal of Surgical Research

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“…Messerli-Odermatt et al demonstrated that low-dose CT is excellent for assessing the CTI (14). MRI and optical imaging systems are under consideration as alternatives for CT (5)(6)(7)(15)(16)(17)(18). Optical imaging systems are good for capturing high-resolution 3D information at a high-speed (7,17,18).…”

Section: Discussionmentioning

confidence: 99%

Surface topography index: a novel deformity severity assessment index for pectus excavatum

Wang¹,

Liu²,

Zhang³

et al. 2021

Transl Pediatr

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Background: The surface topography index (STI) has great potential in both routine computed tomography (CT) scan and emerging optical imaging systems. However, the diagnostic accuracy and stability of the STI as a deformity severity assessment index has not been fully confirmed. Therefore, the aim of the present study was to determine the diagnostic performance of the STI as a novel deformity severity assessment index for pectus excavatum.Methods: The present study consisted of 722 chest CT images from a single center. The standard CT index (CTI) and STI were calculated for all patients. The between-group difference and the level of compliance between the CTI and STI was analyzed by t-test and Pearson correlation. The diagnostic value and optimum discriminatory values of the CTI and STI were calculated by a receiver-operating characteristic (ROC) curve and DeLong's test.Results: The distributions of the CTI and STI were similar and showed a slight overlap between the pectus excavatum (PE) and non-PE groups. Both the CTI and STI significantly differed between the 2 groups (P<0.001). The STI demonstrated a strong Pearson correlation with the CTI (r=0.91, 95% confidence interval: 0.88-0.91, P<0.001). The ROC curves showed that STI =1.58 (sensitivity: 0.93, specificity: 0.95) could be considered equivalent to CTI =2.72 (sensitivity: 0.93, specificity: 0.97) as the optimum discriminatory values. DeLong's test showed no significant difference in the ROC curve results between the CTI and STI (Z=0.90, P=0.37). Conclusions:The STI has comparative discrimination ability in PE diagnosis and deformity severity assessment when used with the standard CTI. The STI as a novel index is not only an ideal evaluation metric of PE deformity but also an objective trait for PE patients just as weight and height for everyone.

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“…The proposed method relies on the employment of an SLS intraoperatively to capture anatomical geometries. Although previous work in this area showed promising results in orthopaedic applications, [21][22][23] SLS technology has recently been tested for neuroanatomy applications, employing SLS to obtain volumetric models suitable for education and surgical planning. 14 To confirm the technical feasibility of the proposed light scanning method, we scanned a patient's bone flap intraoperatively and compared the light scanned model of the flap to the 3D flap model generated from a postoperative CT (slice thickness of 1.25 mm).…”

Section: Patientmentioning

confidence: 99%

Technical report: Rapid intraoperative reconstruction of cranial implants using additively manufactured moulds

Beaulieu

Alkins

Ellis

et al. 2020

Proc Inst Mech Eng H

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During craniotomies, a portion of the calvarium or skull is removed to gain access to the intracranial space. When it is not possible to re-implant the flap, surgeons may repair the defect intraoperatively or at a later date. With larger defects being more difficult to repair intraoperatively, we investigated a method for the creation of patient-specific moulds for ad hoc bone flap reconstruction using rapid prototyping. Patient-specific moulds were created based on light scanned models of the defect, using custom software and rapid prototyping. Polymethylmethacrylate bone implants were created for three retrospective craniotomy cases and evaluated based on original flap and skull reconstruction accuracy. Bone implants created using our moulding method reconstruct the original flap and skull with an average reconstruction accuracy of 0.82 and 1.3 mm, respectively. Average skull reconstruction accuracy obtained by surgeons performing freehand implant reconstruction was 1.49 mm. Time needed to generate moulds was between 2 h and 45 min and 6 h and 20 min. Improvements to current printing technology will make this procedure technically feasible for future cranial procedures.

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A novel technique to measure severity of pediatric pectus excavatum using white light scanning.

Cited by 22 publications

References 16 publications

Physician-Estimated Depth as a Screening Tool for Computed Tomography Evaluation of Pectus Excavatum

Physician-Estimated Depth as a Screening Tool for Computed Tomography Evaluation of Pectus Excavatum

Surface topography index: a novel deformity severity assessment index for pectus excavatum

Technical report: Rapid intraoperative reconstruction of cranial implants using additively manufactured moulds

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