AJR. American journal of roentgenology
-
AJR Am J Roentgenol · Aug 2002
Three-dimensional volumetric interpolated breath-hold MR imaging for whole-body tumor staging in less than 15 minutes: a feasibility study.
The purpose of our study was to evaluate the feasibility and accuracy of three-dimensional (3D) volumetric interpolated breath-hold whole-body MR imaging using CT and nuclear medicine techniques as the standard of reference in patients with metastases. ⋯ The 3D volumetric interpolated breath-hold whole-body MR imaging examination for metastases screening correlates well with CT and scintigraphy. The use of the rolling table platform permits rapid whole-body imaging in an average of 11 min. The preliminary results indicate that the described technique has the potential to emerge as an all-encompassing alternative to conventional multimodality tumor staging strategies.
-
AJR Am J Roentgenol · Jul 2002
Comparative StudyChildren with suspected craniosynostosis: a cost-effectiveness analysis of diagnostic strategies.
Our purpose was to evaluate the clinical and economic impact of three evaluation strategies in children at different risks of craniosynostosis. ⋯ Radiologic screening of completely healthy children (low risk) for synostosis is not warranted because of the high cost per QALY gained of the radiographic and 3D CT strategies. In healthy children with head deformity (intermediate risk), the radiographic strategy had a reasonable cost per QALY gained. Three-dimensional CT was more effective but had a high cost per QALY gained. In children with syndromic craniofacial disorders (high risk), 3D CT was the most effective strategy and had a reasonable cost per QALY gained. Selection of children with suspected craniosynostosis based on their risk group and use of the most appropriate evaluation strategy could maximize clinical and economic outcomes for these patients.
-
AJR Am J Roentgenol · Jul 2002
Comparative StudyBody MR imaging and CT volume: variations and trends based on an analysis of medicare and fee-for-service health insurance databases.
We examined Medicare and fee-for-service data sets to understand better the utilization of MR imaging for imaging the pelvis, abdomen, and chest relative to its use in imaging for other body parts and to the utilization of CT. ⋯ Although far more abdominal CT than abdominal MR imaging is performed, the rate of abdominal MR imaging utilization has increased more rapidly since 1993. The relative procedure volume of abdominal MR imaging varied more than fivefold from rural to urban provider locations and double from nonteaching to teaching hospitals.
-
AJR Am J Roentgenol · Jun 2002
Head and skull base features of nine Egyptian mummies: evaluation with high-resolution CT and reformation techniques.
CT is an indispensable imaging tool in the evaluation of Egyptian mummies because it can noninvasively generate large amounts of data. We applied current CT imaging and postprocessing techniques to methodically survey the head and skull base features of nine Egyptian mummies in the hope of providing paleopathologic and radiologic information. ⋯ CT findings indicated that the intracranial contents of the nine mummies varied tremendously. Destruction of the anterior skull base structures in mummies without intracranial contents suggested a transnasal, transethmoidal approach to excerebration. A large amount of expensive embalming material within the skull of one mummy suggests that he may have been a royal pharoah. A cleft palate deformity was identified in a child mummy. Temporal bone analysis revealed one case of asymmetric mastoid air cell erosion and dehiscence, which is strongly suggestive of prior mastoiditis. Craniocervical junction abnormalities and ossicular chain disruption in several mummies were attributed to postmortem damage. The orbital structures had intentionally been removed in several mummies. Dental disease was ubiquitous among the adult specimens. CONCLUSION. The systematic evaluation of the head and skull base of mummies with CT can provide insight into the life, disease, death, and postmortem treatment of these ancient Egyptians.
-
AJR Am J Roentgenol · Jun 2002
Sonography of the medial and lateral tendons and ligaments of the knee: the use of bony landmarks as an easy method for identification.
Our purpose was to describe the use of bony landmarks in the evaluation of the medial and lateral ligaments and tendons of the knee on sonography and to evaluate the value of this approach in healthy volunteers. ⋯ Bony landmarks can be identified in healthy adults on the medial and lateral aspects of the knee and may serve as reference points for identification of most medial and lateral tendons and ligaments.