Scalp localization using a simple algorithm.
We have developed a simple algorithm for scalp localization for craniotomy. Using a series of CT/MRI data, the point on the scalp closest to the center of the lesion (T) is determined by our program. A plane (plane R) is defined by three points: bilateral auditory meati and T. Point S is the intersection of three planes: the plane R, the scalp surface and the midsagittal plane. The distance from either S or the ipsilateral external auditory meatus to T is measured along the scalp surface on the plane R. The distance from the nasion to S along the scalp surface on the midsagittal plane is also measured. To determine the craniotomy site, these distances are measured directly on a patient's scalp in the operating room. This simple and accurate method for scalp localization could be used by installing our program in conventional CT/MR scanners.
Nakajima
S
S
Department of Neurosurgery, Osaka University Medical School, Japan.
Yoshimine
T
T
Wakita
S
S
Sato
Y
Y
Hata
N
N
Yamada
M
M
Fujiwara
M
M
Tamura
S
S
Kato
A
A
Hayakawa
T
T
D000368:Aged; D000465:Algorithms; D001165:Arteriovenous Malformations / Q000000981:diagnostic imaging / Q000601:surgery*; D003399:Craniotomy / Q000379:methods*; D005260:Female; D006801:Humans; D012535:Scalp; D013238:Stereotaxic Techniques; D014057:Tomography, X-Ray Computed