of the neck
Carlos Bob W.
R. Martinez, Gayler,
Kashima, S. Siegelman,
Computed choice” interpretation cross
THIS EXHIBIT, A SELECTION OF THE GENERAL RADIOLOGY PANEL, WAS DISPLAYED AT THE 67Th SCIENTIFIC ASSEMBLY AND ANNUAL MEFI’INC OF THE RADIOLOGICAL SOCIETY OFNORTH AMERICA, NOVEMBER 15-20, 1981, CHICAGO, ILLINOIS.
tomography for the evaluation ofsuch anatomy
become ofneck is a detailed
imaging Here, exposition
modality to facilitate of the normal
of the neck.
Computed and uation airway This
tomography, detail, has rapidly neck
with masses. reviews
for displaying modality sectional
the imaging cross
of choice anatomy
in the evalof the neck
of patients with communication
Department of Radiology and Radiological Science, The Johns Hopkins Medical Institutions, Baltimore, Maryland. t Presently, Radiological Services, TampaGeneral Hospital, Davis Islands, Tampa, Florida. From the Department of Laryngology and Otology, The Johns Hopkins Medical Institutions, Baltimore, Maryland.
Address R. Martinez, reprints requests to Carlos
as depicted by CT using fifteen reference levels extending from the thoracic inlet. The capabilities and limitations of this technique and interesting cases that illustrate the use of CTin the diagnosis of patients with head and neck tumors will be presented.
the mastoid tip to will be discussed, and management
This report is derived of head and neck tumors. 500) unit. The examinations
for evaluation (AS&E Pfizer with the neck
from the study of 140 patients referred Scans were obtained with a high resolution were carried out in the supineposition
M.D., Radiological vices, Tampa General Hospital, Islands, Tampa, Florida 33606.
slightly hyperextended and during quiet breathing. The scanning plane was parallel to the infraorbitomeatal line. In most instances 10 mm sections were obtained at 10 mm intervals using a 10 second exposure, 20 mA, and 120 kVp. In specific instances, such as the evaluation of the larynx andtrachea or the examination of an uncooperative patient, a shorter (5 second) scanning time and higher (50) mA setting
were used. pharyngeal, tumors,
For the laryngeal sections
examination or other were We infusion material
hardening artifacts from heads. This isparticularly obese patient with a short
the humeral true in an neck. This
and a low (-200 lows visualization larities in the
H.U.) level. of minor outline of the
This alirreguairway soft
obtained found the of a 30% to be of neck
at 5 mm intervals. rapid intravenous iodinated helpful masses. One prior to the 200 cc were approximately infusion rate without dle difficultycontrast
problem can be partially solved by using a “swimmer’s” position and increasing the tube current. Artifacts from dental fillings can be avoided by obtaining open mouth views slight changes in the scanning or by plane.
that might be obscured tissue settings were used. my,
in the CT evaluation
To represent the normal anato15 scans have been selected, beat the level of thenasopharto the diagram thoracic depicts level.
hundred cc were given first scan; an additional infused at the rate of 20 cc per minute. This was usually achieved if a 19 gauge neewas of
Motion lowing patient the tongue.
ynx and extending inlet. This reference some Line from structures of the structures
can be avoided by asking the to...