scholarly journals Automatic Segmentation and Measurement of Infantile Hemangioma

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 138
Author(s):  
Serban Oprisescu ◽  
Mihai Ciuc ◽  
Alina Sultana

Infantile hemangiomas (IHs) are a type of vascular tumors that affect around 10% of newborns. The measurement of the lesion size and the assessment of the evolution is done manually by the physician. This paper presents an algorithm for the automatic computation of the IH lesion surface. The image scale is computed by using the Hough transform and the total variation. As pre-processing, a geometric correction step is included, which ensures that the lesions are viewed as perpendicular to the camera. The image segmentation is based on K-means clustering applied on a five-plane image; the five planes being selected from seven planes with the use of the Karhunen-Loeve transform. Two of the seven planes are 2D total variation filters, based on symmetrical kernels, designed to highlight the IH specific texture. The segmentation performance was assessed on 30 images, and a mean border error of 9.31% was obtained.

2021 ◽  
Vol 13 (3) ◽  
pp. 347-356
Author(s):  
Aoife Naughton ◽  
Ariel Yuhan Ong ◽  
Goran Darius Hildebrand

Infantile hemangiomas are common benign vascular tumors but are rarely found in an intracranial location. Our literature review identified 41 reported cases. There is no general consensus on management of these rare lesions and until recently, treatment was limited to surgery or pharmacological management with steroids or interferon. Although beta-blockers have been widely prescribed in the treatment of cutaneous infantile hemangiomas since 2008, their use in the treatment of intracranial infantile hemangiomas has been minimal. We present a case of infantile hemangioma affecting the right orbit, associated with intracranial extension, causing intermittent right facial nerve palsy. The patient achieved an excellent outcome following combined treatment with oral propranolol and topical timolol maleate 0.5%, with complete regression of the lesion by 4 months. We conclude that beta-blockers are a safe and effective treatment of intracranial infantile hemangiomas and can be employed as first-line management of these lesions.


Author(s):  
Karimov M.A. ◽  
Mamarasulova D.Z. ◽  
Sadykov R.R. ◽  
Nurmatova Kh.Kh.

Scientific work was carried out on the basis of the Tashkent Medical Academy, Department of Surgery (1st city hospital), and Andijan Medical Institute, Department of Oncology from 2015-2020.  Clinical material includes 175 patients.  The comparison group consisted of 100 patients who were treated in various hospitals in Tashkent and regions of Uzbekistan.  According to the classification of vascular anomalies, the majority of patients with benign vascular tumors (DBT) were diagnosed with infantile hemangioma (IG) - 82.0%, congenital hemangioma (VH) - 11.4%, pyogenic granuloma (PG) - 5.8%.  Average age of patients: children - 1.2 ± 0.4, adults - 27 ± 1.2 years.  The frequency of DSO in girls was 78%, in boys - 22%.  Localization area: lip - 57.6%, cheek 8%, tongue 26.3%.  Complications of DSO: anatomical disorders, edema, bleeding, pain, infection, respiratory disorders occurred in 83.7% of patients.


2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Tsutomu Gomi ◽  
Yukio Koibuchi

Purpose. We evaluated the efficacies of the adaptive steepest descent projection onto convex sets (ASD-POCS), simultaneous algebraic reconstruction technique (SART), filtered back projection (FBP), and maximum likelihood expectation maximization (MLEM) total variation minimization iterative algorithms for reducing exposure doses during digital breast tomosynthesis for reduced projections. Methods. Reconstructions were evaluated using normal (15 projections) and half (i.e., thinned-out normal) projections (seven projections). The algorithms were assessed by determining the full width at half-maximum (FWHM), and the BR3D Phantom was used to evaluate the contrast-to-noise ratio (CNR) for the in-focus plane. A mean similarity measure of structural similarity (MSSIM) was also used to identify the preservation of contrast in clinical cases. Results. Spatial resolution tended to deteriorate in ASD-POCS algorithm reconstructions involving a reduced number of projections. However, the microcalcification size did not affect the rate of FWHM change. The ASD-POCS algorithm yielded a high CNR independently of the simulated mass lesion size and projection number. The ASD-POCS algorithm yielded a high MSSIM in reconstructions from reduced numbers of projections. Conclusions. The ASD-POCS algorithm can preserve contrast despite a reduced number of projections and could therefore be used to reduce radiation doses.


2003 ◽  
Vol 6 (6) ◽  
pp. 495-510 ◽  
Author(s):  
Beatriz Berenguer ◽  
John B. Mulliken ◽  
Odile Enjolras ◽  
Lawrence M. Boon ◽  
Michel Wassef ◽  
...  

We define the histopathologic findings and review the clinical and radiologic characteristics of rapidly involuting congenital hemangioma (RICH). The features of RICH are compared to the equally uncommon noninvoluting congenital hemangioma (NICH) and common infantile hemangioma. RICH and NICH had many similarities, such as appearance, location, size, and sex distribution. The obvious differences in behavior served to differentiate RICH, NICH, and common infantile hemangioma. Magnetic resonance imaging (MRI) of the three tumors is quite similar, but some RICH also had areas of inhomogeneity and larger flow voids on MRI and arterial aneurysms on angiography. The histologic appearance of RICH differed from NICH and common infantile hemangioma, but some overlap was noted among the three lesions. RICH was composed of small-to-large lobules of capillaries with moderately plump endothelial cells and pericytes; the lobules were surrounded by abundant fibrous tissue. One-half of the specimens had a central involuting zone(s) characterized by lobular loss, fibrous tissue, and draining channels that were often large and abnormal. Ancillary features commonly found were hemosiderin, thrombosis, cyst formation, focal calcification, and extramedullary hematopoiesis. With one exception, endothelial cells in RICH (as in NICH) did not express glucose transporter-1 protein, as does common infantile hemangioma. One RICH exhibited 50% postnatal involution during the 1st year, stopped regressing, was resected at 18 months, and was histologically indistinguishable from NICH. In addition, several RICH, resected in early infancy, also had some histologic features suggestive of NICH. Furthermore, NICH removed early (2–4 years), showed some histologic findings of RICH or were indistinguishable from RICH. We conclude that RICH, NICH, and common infantile hemangioma have overlapping clinical and pathologic features. These observations support the hypothesis that these vascular tumors may be variations of a single entity ab initio. It is unknown whether the progenitor cell for these uncommon congenital vascular tumors is the same as for common infantile hemangioma.


2021 ◽  
Author(s):  
Hanguang XIAO ◽  
Zhiqiang RAN ◽  
Shingo MABU ◽  
Banglin ZHANG ◽  
Bolong ZHANG ◽  
...  

Abstract The coronavirus disease 2019 (COVID-19) epidemic has spread worldwide and the healthcare system is in crisis. Accurate, automated and rapid segmentation of COVID-19 lesion in computed tomography (CT) images can help doctors diagnose and provide prognostic information. However, the variety of lesions and small regions of early lesion complicate their segmentation. To solve these problems, we propose a new SAUNet++ model with squeeze excitation residual (SER) module and atrous spatial pyramid pooling (ASPP) module. The SER module can assign more weights to more important channels and mitigate the problem of gradient disappearance, the ASPP module can obtain context information by atrous convolution using various sampling rates. In addition, the generalized dice loss (GDL) can reduce the correlation between lesion size and dice loss, and is introduced to solve the problem of small regions segmentation. We collected multinational CT scan data from China, Italy and Russia and conducted extensive experiments. In the experiments, SAUNet++ and GDL were compared to advanced segmentation models and popular loss functions, respectively. The experimental results demonstrated that our methods can effectively improve the accuracy of COVID-19 lesion segmentation on the dice similarity coefficient (our: 87.38% VS U-Net++: 86.08%), sensitivity (our: 93.28% VS U-Net++: 89.85%) and hausdorff distance (our: 19.99mm VS U-Net++: 27.69mm), respectively.


Author(s):  
Alexander K. C. Leung ◽  
Joseph M. Lam ◽  
Kin Fon Leong ◽  
Kam Lun Hon

Background: Infantile hemangiomas are the most common vascular tumors of infancy affecting up to 12% of infants by the first year of life. Objective: To familiarize physicians with the natural history, clinical manifestations, diagnosis, and management of infantile hemangiomas. Methods: A Pubmed search was conducted in November 2019 in Clinical Queries using the key term "infantile hemangioma". The search strategy included meta-analyses, randomized controlled trials, clinical trials, observational studies, and reviews published within the past 20 years. Only papers published in the English literature were included in this review. The information retrieved from the above search was used in the compilation of the present article. Results: The majority of infantile hemangiomas are not present at birth. They often appear in the first few weeks of life as areas of pallor, followed by telangiectatic telangiectatic or faint red patches. They then grow rapidly in the first 3 to 6 months of life. Superficial lesions are bright red, protuberant, bosselated or with a smooth surface, and sharply demarcated. Deep lesions are bluish and dome-shaped. Infantile hemangiomas continue to grow until 9 to 12 months of age, at which time the growth rate slows down to parallel the growth of the child. Involution typically begins by the time the child is a year old. Approximately 50% of infantile hemangiomas will show complete involution by the time a child reaches age 5; 70% will have disappeared by age 7; and 95% will have regressed by 10 to 12 years of age. The majority of infantile hemangiomas require no treatment. Treatment options include oral propranolol, topical timolol, and oral corticosteroids. Indications for active intervention include hemorrhage unresponsive to treatment, impending ulceration in areas where serious complications might ensue, interference with vital structures, life- or function-threatening complications, and significant disfigurement. Conclusion: Treatment should be individualized, depending upon the size, rate of growth, morphology, number and location of the lesion (s), existing or potential complications, benefits and adverse events associated with the treatment, age of the patient, level of parental concern, and the physician's comfort level with the various treatment options. Currently, oral propranolol is the treatment of choice for high-risk and complicated infantile hemangiomas. Topical timolol may be considered for superficial infantile hemangiomas which need to be treated and for complicated infantile hemangiomas in patients at risk for severe adverse events from oral administration of propranolol.


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