Prospective Comparison of 70-kVp Single-Energy CT versus Dual-Energy CT: Which is More Suitable for CT Angiography with Low Contrast Media Dosage?
Publication date: Available online 16 September 2019Source: Academic RadiologyAuthor(s): Morikatsu Yoshida, Takeshi Nakaura, Takada Sentaro, Shota Tanoue, Hatsuki Inada, Daisuke Utsunomiya, Naritsugu Sakaino, Kazunori Harada, Yasuyuki YamashitaRationale and ObjectivesTo compare the objective and subjective image qualities between single-energy computed tomography (CT) at 70 kVp and virtual monoenergetic imaging (VMI) of dual-source dual-energy CT for CT angiography with 180 mgI/kg.Materials and MethodsTotal 63 patients scanned with 180 mgI/kg were randomly divided into two groups: Group A (32 patients) underwent CT angiography at 70-kVp, and Group B (31 patients) underwent dual-energy CT. VMI sets were generated at 10-keV increments between 40 and 100 keV. We calculated aortic attenuation, contrast-to-noise-ratio (CNR), signal-to-noise-ratio, figure of merit of CNR, and effective dose for each protocol. Three radiologists scored overall image quality and various arteries’ visibility using a four-point scale. Quantitative and qualitative comparisons between 70 kVp and VMI with the highest CNR were performed with the two-tailed t test or Kruskal–Wallis test.ResultsThe 40-keV images offered the highest CNR among VMIs. Aortic attenuation at 70 kVp was significantly lower than that at 40 keV (p
ConclusionsThe carotid bifurcation is in close proximity to various calcified anatomical structures. This should be taken into account when diagnosing CCPs in panoramic radiographs (PRs). In the coronal view, CCPs and the cervical spine are often superimposed; thus, coronal images are not recommended for confirmation of putative carotid calcifications diagnosed on PRs.
Aortoenteric fistula (AEF) is a rare cause of gastrointestinal (GI) bleeding. If not promptly diagnosed and treated the associated mortality is very high. The role of endovascular treatment is not yet defined. In this paper we report a clinical case of a 94-year-old male admitted in the emergency department with rectal bleeding. Due to detection of a pulsatile abdominal mass, a computed tomography angiography (CTA) scan was performed, which established the diagnosis of aorto-enteric fistula due to a left common iliac artery aneurysm (CIAA) ruptured to the sigmoid colon and also revealed an abdominal aortic aneurysm (AAA) a...
ConclusionAll the characteristics of the work should alert the radiologist to consider lymphoma among the possible differential diagnoses, always correlating the results of the CT examination with appropriate clinical laboratory evaluations.
Conclusions: In this report, we describe a rare case of ALL with HCC, located in the left subphrenic area, especially which was supplied by the branch of left hepatic artery has rarely been described. The clinical presentation, radiological features are described in the literature.
Conclusions: A perfect pre-operative examination is a key to successful surgery. Further studies should be conducted to find out more effective treatments for traumatic comminuted skull fractures.
ConclusionsThe role of immunosuppression and immune tolerance mechanisms in the response to invasive fungal infection treatment is an important factor in the SOT population and should not be underestimated. The choice of the antifungal should consider not only their toxicity but also their effects on the immune system, two features that are intertwined.
In conclusion, the clinical suspicion of GCA is fundamental for an early diagnosis. The authors consider that ergotamine might have triggered tongue ischemia in this case. PMID: 31575844 [PubMed - as supplied by publisher]
Conclusion: Although attention to thrombosis risk factors, clinical symptoms, and laboratory findings, can be helpful in screening patients with suspected PE, considering the ability of CT scan in confirming or ruling out other possible differential diagnoses, it seems that a revision should be done to lower the threshold of ordering this diagnostic modality for suspected cases. PMID: 31555771 [PubMed]
CONCLUSIONS: CTA can reliably support a diagnosis of BD. The criterion of the absence of deep venous opacification, which can be assessed by use of the VS criteria investigated in this study, can confirm the occurrence of cerebral circulatory arrest.Clinical trial registration no.: 12500913400000068 (clinicaltrials.gov). PMID: 31561215 [PubMed - as supplied by publisher]
An elderly woman presented with chest pain that radiated to the back for several hours.Here is here initial ECG:There is only a nonspecific flat T-wave in aVL. It is essentially normal.The first troponin returned at 0.099 ng/mL (elevated, consistent with Non-Occlusion MI)Providers were concerned with aortic dissection, so they order a chest aorta CT.This showed no dissection but did show the following:Notice the area of the lateral wall (lower right) that has no contrast enhancement (It is dark, where areas of enhancement are light-colored). This transmural ischemia, but not necessarily completed infarction...