Improving point correspondence in cephalograms by using a two-stage rectified point transform

Computers in Biology and Medicine
Weng-Kong Tam, Hsi-Jian Lee

Abstract

An improved point correspondence method was developed for automatically detecting two-dimensional cephalometric landmarks. The proposed method uses a two-stage rectified point transform: the global correspondence of interest points between two images and the local correspondence of landmarks. In the first stage, point-to-point matching pairs were established using local corner point features. The matched points on an input image were treated as a set of transformations, with varying directions and magnitudes, from the template image. Similarity of the transformation vectors was achieved through rectification to exclude vectors that deviated widely from the statistical mean. Rectification attempted to remove noise and irrelevant matched points. In the second stage, the point correspondences were fine-tuned within the regional centers of the landmarks, which were classified into three categories-corners, edges, and structural points-and each category was fine-tuned using a different strategy. Correspondence was performed by evaluating the shortest Euclidean distance between the point descriptors of the template and test images. The correspondence results of 20 orthodontic landmarks were compared with those identified by dental pr...Continue Reading

References

Jan 1, 1979·European Journal of Orthodontics·C M Forsberg, L Odenrick
Jun 1, 1989·Computers and Biomedical Research, an International Journal·S ParthasarathyD F Fay
Mar 1, 1989·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·O B Drobocky, R J Smith
Jun 1, 1986·Computers and Biomedical Research, an International Journal·A D Lévy-MandelJ K Tsotsos
Apr 1, 1968·American Journal of Orthodontics·R M Ricketts
Jul 1, 1980·American Journal of Orthodontics·S Baumrind, D M Miller
Mar 4, 1998·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·D J RudolphJ M Coggins
May 13, 1998·Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopädie : Organ/official Journal Deutsche Gesellschaft Für Kieferorthopädie·T StammF Bollmann
Feb 6, 1999·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·Y T ChenJ K Liu
Dec 6, 2000·European Journal of Orthodontics·T J HuttonP Hammond
May 9, 2001·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·M N Spyropoulos, D J Halazonetis
Jul 24, 2001·Medical & Biological Engineering & Computing·J YangG Ding
Nov 29, 2001·Journal of Biomedical Informatics·V GrauC Knoll
Oct 22, 2005·IEEE Transactions on Pattern Analysis and Machine Intelligence·Krystian Mikolajczyk, Cordelia Schmid
Aug 19, 2006·IEEE Transactions on Bio-medical Engineering·Weining YueTianmin Xu
Jan 16, 2008·The Angle Orthodontist·Rosalia LeonardiConcetto Spampinato
Jan 1, 1994·IEEE Transactions on Medical Imaging·J Cardillo, M A Sid-Ahmed
Apr 23, 2009·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Mayumi NomuraHideharu Yamaguchi
Sep 16, 2009·Journal of Biomedicine & Biotechnology·Rosalia LeonardiFrancesco Maiorana
Mar 6, 2010·European Journal of Orthodontics·Predrag VucinićIvana Sćepan
Aug 13, 2010·Journal of Medical Systems·Arumugam BanumathiVarathan Abhaikumar
Jun 1, 1986·IEEE Transactions on Pattern Analysis and Machine Intelligence·J Canny
Dec 14, 2012·Dento Maxillo Facial Radiology·Sh ShahidiS M Danaei

❮ Previous
Next ❯

Citations

Sep 5, 2015·Veterinary Research·Marion ThépautBenoit Guery

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Computers in Biology and Medicine
Vasiliki E MarkakiGeorge K Matsopoulos
Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Shu LiangLinda G Shapiro
Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society
Konstantinos K DelibasisGeorge K Matsopoulos
© 2021 Meta ULC. All rights reserved