Femoroacetabular impingement syndrome occurs in young, very active individuals, usually in association with high-end sports–related activity or overparticipation in sports-related activity; it manifests as hip pain, restricted motion, positive impingement test results, and appropriate imaging findings; and it can be successfully treated in specific cases without advanced osteoarthritis.
We believe that our readers are interested in investigations describing physicians’ performance of specific techniques under reasonably realistic conditions. The simulation of such realistic conditions, however, does not only require thorough reporting of variability between observers and techniques; it also requires a sufficiently high number of observers.
Unless clinical studies demonstrate previously unrecognized changes on serial MR imaging studies under such circumstances which likely are not based on the mechanisms of actions described earlier, the recommendation for short-term follow-up MR imaging after preoperative assessment should be reconsidered.
The radiologists of tomorrow will return to playing their full roles as physicians; they will not only sit in front of picture archiving and communication system monitors interpreting images, but will see patients and remain continuously in touch with their clinical colleagues.
In Europe, Asia, and Canada, characterization of focal liver masses is the first and best established use of contrast-enhanced US, allowing for the noninvasive diagnosis of commonly encountered liver masses with comparable accuracy to that of CT and MR studies.
The time added to radiologists’ interpretations of screening mammograms by the use of computer-aided detection is an important consideration in the assessment of the efficiency of digital mammography interpretation.
A quantitative dynamic contrast-enhanced MR imaging method has been developed to assess treatment response to neoadjuvant chemotherapy in patients with breast cancer by using standard clinical dynamic contrast-enhanced MR imaging data without measuring either arterial input function or baseline T1.
Our results show that in patients with breast cancer, the pretreatment apparent diffusion coefficients of patients who responded to neoadjuvant chemotherapy are significantly lower than those of patients who did not respond to neoadjuvant chemotherapy.
Subclinical atherosclerosis demonstrated by coronary artery calcium score correlates with future regional wall motion abnormalities, with associated reduced systolic and diastolic function not predicted by specific recorded coronary events.
The overall high sensitivity and specificity in distinguishing early from advanced hepatic fibrosis is a strong argument that liver biopsy can be replaced by MR elastography for assigning a score to fibrosis.
Visually isoattenuating pancreatic adenocarcinoma has different pathologic characteristics and a better patient survival after surgery than does usual pancreatic adenocarcinoma and is moderately sensitive to detection with MR and PET/CT.
The imaging features of small solid pseudopapillary tumors (SPTs) were different from those of typical SPTs, and the small SPTs usually appeared as purely solid lesions with sharp margins and gradual enhancement, without secondary changes to the neighboring pancreatic parenchyma.
Our study presents MR imaging and analysis methods that enable a quantitative assessment of gastroesophageal structure and function that is sensitive to physiologic events such as respiration and gastric filling.
Clear cell and non–clear cell renal cell carcinomas possess different diffusion characteristics that can be distinguished with high sensitivity and specificity when b values of 0 and 800 sec/mm2 are used to calculate apparent diffusion coefficients.
Anatomic masticator space involvement affects the overall survival and local relapse-free survival of patients with nasopharyngeal carcinoma; therefore, it is recommended that anatomic masticator space involvement that includes the medial and lateral pterygoid muscles be classified as stage T4 disease.
The conversion factors used to compute the effective dose from the dose-length product may have to be updated with respect to modern cone-beam CT scanners and have to reflect the new International Commission on Radiological Protection recommendations.
We have shown reduced failure load and stiffness of the distal radius in women with anorexia nervosa (AN) compared with age-matched control subjects by using finite element models created from 150-μm resolution flat-panel volume CT; reductions in trabecular bone volume fraction, trabecular number, and bone mineral density and an increase in trabecular separation were observed in the AN group.
With the application of 7-T MR and a modified three-dimensional gradient-echo sequence, sufficiently high signal-to-noise ratio for sodium imaging of both cartilage transplants and native cartilage was achieved.
The results of this study indicate that the Durie-Salmon and the Durie-Salmon PLUS staging systems are moderately concordant and that MR imaging findings as the basis of staging with the Durie-Salmon PLUS staging system should not solely be the reason for initiating systemic therapy.
Dual-energy CT has high sensitivity and specificity in the differentiation of intraparenchymal hemorrhage from iodinated contrast material staining and may be particularly helpful in patients who have recently undergone intraarterial stroke therapy.
The anterior temporal epidural hematoma is associated with low risks of uncal herniation, brainstem compression, and midline shift because of its probable venous cause, low propensity to enlarge over time, and location anterior rather than lateral to the temporal lobe.
The tracheal dimensions in children with congenital diaphragmatic hernia who underwent fetoscopic endoluminal tracheal occlusion were larger than those in patients who were treated expectantly in pregnancy.
Percutaneous radiologic treatment for self-imbedded soft-tissue foreign bodies is safe, precise, and effective for radiopaque and nonradiopaque foreign bodies, including those at risk for fragmentation during traditional surgical removal techniques.
Through this effort, a national strategy to address overutilization should be developed as a reflection of the need for greater accountability by radiology and health care professions in general in their stewardship of the expensive technologies used to improve the health and health care of patients.
A single breast-specific gamma imaging or positron emission mammography study is associated with a fatal radiation-induced cancer risk higher than or comparable to that of annual screening mammography in women aged 40–80 years.
In our study directly comparing in vivo human imaging of the right coronary artery at 7 T and 3 T in young healthy volunteers, quantitative parameters related to image quality attained at 7 T equal or surpass those at 3 T.
Submaximal inspiration induces underestimation of the extent of pulmonary emphysema, and lung tissue loss and total lung capacity influence CT indexes, suggesting the need to establish normal CT values.
The use of a low-radiation-dose digital tomosynthesis technique is superior to the use of radiography for the detection of lung lesions, especially cavitary lesions, in patients with pulmonary mycobacterial disease.
Selective chemoembolization via the caudate artery is possible in most patients with caudate lobe hepatocellular carcinoma and a critical factor in longer overall survival and longer progression-free survival.
Scapulothoracic dissociation may be underreported due to the high associated mortality rate; a well-centered chest radiograph revealing a laterally displaced scapula in the acute setting should prompt immediate vascular imaging work-up.