Today X-ray micro computer tomography (μCT) imaging is used to investigate bone microarchitecture. μCT imaging is obtained by polychromatic X-ray beams, resulting in images with beam hardening artifacts, resolution levels at 10 μm, geometrical blurring, and lack of contrasts. When μCT is coupled to synchrotron sources (SRμCT) a spatial resolution up to one tenth of a μm may be achieved. A review of the literature concerning SRμCT was performed to investigate its usability and its strength in visualizing fine bone structures, vessels, and microarchitecture of bone. Although mainly limited to in vitro examinations, SRμCT is considered as a gold standard to image trabecular bone microarchitecture since it is possible in a 3D manner to visualize fine structural elements within mineralized tissue such as osteon boundaries, rods and plates structures, cement lines, and differences in mineralization.
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http://dx.doi.org/10.1016/j.jcms.2013.11.015 | DOI Listing |
Front Plant Sci
September 2024
College of Grassland Science, Qingdao Agricultural University, Qingdao, China.
Seed vigor is an important trait closely related to improved seed quality and long-term germplasm conservation, and it gradually decreases during storage, which has become a major concern for agriculture. However, the underlying regulatory mechanisms of seed vigor loss in terms of genes remain largely unknown in quinoa. Here, two cultivars of quinoa seeds with different storage performance, Longli No.
View Article and Find Full Text PDFCancer Med
August 2024
The First Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China.
Background: Pancreatoblastoma (PB) is one of the rare malignant tumors that typically occurs in children. Cases of PB in adults are highly unusual. This disease often presents with subtle symptoms and lacks characteristic clinical manifestations, leading to diagnostic challenges.
View Article and Find Full Text PDFActa Otolaryngol
November 2023
Senior Department of Otolaryngology-Head and Neck Surgery, the Sixth Medical Center of PLA General Hospital, Beijing, China.
There is no report on the relationship between congenital malformation of the outer ear and hearing, which makes it possible to predict the hearing level just based on microtia grades. To investigate the correlation between two types of congenital malformation of the outer ear [microtia and Outer Ear Canal Malformation (OECM)] and hearing, as well as the interrelationship among all three variables. A total of 535 cases (598 ears) of congenital malformation of the middle and outer ear (CMMOE) with hearing data, out of which 319 cases (349 ears) microtia with available images and graded by I-V, 449 cases (482 ears) OECM graded by atresia, stenosis and normal, and 87 cases (87 ears) OEC atresia graded I-IV, 301 cases (301 ears) with materials of microtia, OECM and hearing at the same time were carried out correlation analysis.
View Article and Find Full Text PDFActa Otolaryngol
November 2023
Senior Department of Otolaryngology-Head and Neck Surgery, the Sixth Medical Center of PLA General Hospital, Beijing, China.
The preoperative evaluation of Congenital Malformation of the Middle and Outer Ear (CMMOE) is very important. Jahrsdoerfer score commonly used at present, based on CT scanning images of the temporal bone, is often unable to accurately evaluate deformity and hearing level. To investigate and promote a straightforward and easily accessible assessment method, pure tone audiometry, for the evaluation of CMMOE.
View Article and Find Full Text PDFClin Ophthalmol
March 2023
Yagasaki Eye Clinic, Ichinomiya, Aichi, Japan.
Purpose: To analyze surgical results of 32 cases with acute acquired comitant esotropia (AACE) related to prolonged use of digital devices (DDs).
Patients And Methods: Medical records of cases with AACE related to prolonged use of DDs that had undergone surgery were retrospectively revised. Complete medical history and full ophthalmological examinations before and surgery were obtained for all cases.
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