Markerless registration approach using dynamic touchable region model

xlomafota13 shared this article with you from Inoreader Markerless registration approach using dynamic touchable region model Via The International Journal of Medical Robotics and Computer Assisted Surgery Abstract Background Markerless registration is required for image-guided surgery; it has limited accuracy due to the ambiguity of the correspondence point set. In this study, we proposed a registration framework to improve registration accuracy for markerless registration using a dynamic touchable region model (DTRM). Methods The DTRM is defined using the geometric characteristics of the surface around the fiducial area using Intrinsic Shape Signature (ISS) keypoints. The new registration procedure, which combines the DTRM with iterative closest point-based registration (ICDTP) was implemented and verified with phantom experiments for a single-user and multi-user study. Results The ICDTP registration framework provides improved performance over the paired-point registration for surgeries, where it is inappropriate to construct the corresponding positions with adhesive fiducial markers. Conclusion The proposed method can be an alternative approach for image-guided surgery in operations for which it is not appropriate to set up markers for registration. This article is protected by copyright. All rights reserved. View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Symptomatic Lingual Thyroglossal Duct Cyst in Children: A Laryngomalacia Phenotype

xlomafota13 shared this article with you from Inoreader Symptomatic Lingual Thyroglossal Duct Cyst in Children: A Laryngomalacia Phenotype Via otol rhinol Ann Otol Rhinol Laryngol. 2022 Jan 31:34894221075082. doi: 10.1177/00034894221075082. Online ahead of print. ABSTRACT OBJECTIVES: Patients with lingual thyroglossal duct cyst (TGDC) can present as symptomatic with obstructive airway and feeding difficulties. METHODS: We present 3 cases of symptomatic lingual TGDC. RESULTS: All 3 patients were diagnosed with laryngomalacia and underwent further concurrent or delayed airway intervention, in addition to cyst removal . CONCLUSIONS: We reason that there is a phenotype of laryngomalacia in the symptomatic lingual thyroglossal duct cyst patients who present with symptoms due to disruption in laryngeal anatomy rather than the cyst itself causing obstructive symptoms. Distinguishing this phenotype, especially in comparison to other pathologies such as vallecular cysts, may better allow for planning of concurrent or delayed airway procedures and overall counseling of parents. PMID:35100842 | DOI:10.1177/00034894221075082 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Sino-nasal hemangiopericytoma: a case series and systematic literature review

xlomafota13 shared this article with you from Inoreader Sino-nasal hemangiopericytoma: a case series and systematic literature review Via http://link.springer.com/journal/405,European archives of oto-rhino-laryngology,The European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino Eur Arch Otorhinolaryngol. 2022 Feb 1. doi: 10.1007/s00405-021-07239-w. Online ahead of print. ABSTRACT BACKGROUND: Hemangiopericytoma is a rare tumor of the sino-nasal tract. Its clinical behavior is controversial. Whereas some describe an indolent course, others consider it to be an aggressive lesion with a tendency toward rapid local recurrence. Here, we describe our experience in the management of sino-nasal hemangiopericytoma (SN-HPC), comparing our experience with the current literature, and evaluating signs and tools to improve diagnosis and treatment. METHODS: All cases of SN-HPC between 2010 and 2020 were extracted and reviewed from our institutional electronic medical records. SN-HPC cases from PubMed and EMBASE between 2010 and 2020 were analyzed in a systematic literature review using the preferred reporting items for systematic review and meta-analysis (PRISMA) guidelines. Data regarding demographics, presentation, d iagnosis, treatment, and outcome were collected. RESULTS: We identified four cases of SN-HPC in the nasal cavity in our institution and an additional 53 cases in previous reports. The mean age at the time of diagnosis was 59 years, with a 1.2:1 male to female ratio. SN-HPC mostly appears unilaterally, arising in the ethmoid sinus (42.1%). The most common presenting symptoms were epistaxis (47.3) and nasal obstruction (47.3%). Both computed tomography (CT) and magnetic resonance imaging (MRI) were required for diagnosis and for tailoring the treatment plan. Endoscopic surgical excision was used in 85.9% of the patients, and in 15.7%, an additional preoperative embolization was performed, which was associated with septal necrosis in one patient (2.6%). The recurrence rate was 7%. CONCLUSION: Although previous reports attribute an aggressive tumoral behavior to SN-HPC, our experience and the literature review support a more indolent course with low recurrence rates followin g complete endoscopic resection. Preoperative embolization can be useful in certain cases, but due to potential complications, it should not be routinely indicated. PMID:35103868 | DOI:10.1007/s00405-021-07239-w View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.