AJR. American journal of roentgenology
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AJR Am J Roentgenol · Oct 2011
Comparative StudyDiagnosis of the invasion depth of gastric cancer using MDCT with virtual gastroscopy: comparison with staging with endoscopic ultrasound.
The objectives of this study were to retrospectively evaluate the lesion detection rate of gastric cancer using only virtual gastroscopy generated from MDCT images and the accuracy of invasion depth diagnosis (T staging) using virtual gastroscopy together with contrast-enhanced MDCT with multiplanar reconstruction (MPR) images (virtual gastroscopy with MPR), and to compare the diagnostic performance between virtual gastroscopy with MPR images and endoscopic ultrasound. ⋯ Virtual gastroscopy with MPR imaging is a useful modality in the T staging of gastric cancer.
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AJR Am J Roentgenol · Oct 2011
ReviewBone marrow edema patterns in the ankle and hindfoot: distinguishing MRI features.
Many disorders produce similar or overlapping patterns of bone marrow edema in the ankle. Bone marrow edema may present in a few hindfoot bones simultaneously or in a single bone. The purpose of this pictorial essay is to provide guidelines based on clinical history and specific MRI patterns and locations to accurately identify the cause of ankle bone marrow edema. We will first focus on bone marrow edema in general disease categories involving multiple bones, such as reactive processes, trauma, neuroarthropathy, and arthritides. A discussion of bone marrow edema in individual bones of the ankle and hindfoot including the tibia, fibula, talus, and calcaneus will follow. Helpful hints for arriving at the correct diagnosis will be provided in each section. ⋯ After review of this article, radiologists should be able to use their knowledge of clinical history and specific MRI patterns and locations to accurately distinguish between the various causes of bone marrow edema in the ankle and hindfoot.
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AJR Am J Roentgenol · Oct 2011
Comparative StudyRadiation dose exposure for lumbar spine epidural steroid injections: a comparison of conventional fluoroscopy data and CT fluoroscopy techniques.
The purpose of this article is to compare the radiation dose of conventional fluoroscopy-guided lumbar epidural steroid injections (ESIs) and CT fluoroscopy (CTF)-guided lumbar ESI using both clinical data and anthropomorphic phantoms. ⋯ The ED for the CTF-guided ESI was almost half that of conventional fluoroscopy because of the shorter fluoroscopy time. However, the overall radiation dose for CTF-guided ESIs can be up to four times higher when a full diagnostic lumbar CT scan is performed as part of the procedure. Radiation dose reduction for CTF-guided ESI is best achieved by minimizing the dose from the preliminary planning lumbar spine CT scan.
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AJR Am J Roentgenol · Oct 2011
Comparative StudyError rates in breast imaging reports: comparison of automatic speech recognition and dictation transcription.
The purpose of this study was to compare the error rates in breast imaging reports generated with automated speech recognition (ASR) technology as opposed to conventional dictation transcription. ⋯ Reports generated with ASR are associated with higher error rates than reports generated with conventional dictation transcription. The imaging modality used is a predictor of the occurrence of reporting errors. Conversely, native language and academic rank of the speaker do not have a significant influence on error rate.
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Acromioclavicular joint injuries are usually diagnosed by clinical and radiographic assessment with the Rockwood classification, which is crucial for treatment planning. In view of the implementation of MRI for visualization of the acromioclavicular joint, the purpose of this study was to describe the MRI findings of acromioclavicular joint dislocation in comparison with the radiographic findings. ⋯ In a considerable number of patients, the MRI findings change the Rockwood type determined with radiography. In addition to clinical assessment and radiography, MRI may yield important findings on ligaments that may influence management.