2
|
Cerne JW, Pathrose A, Singer AM, Moore JE, Serhal A, Aouad P, Umair M, Ragin A, Allen BD, Avery R, Markl M, Carr JC. MRA of the Supraaortic Vasculature: Comparison of Gadobutrol and Gadoterate Meglumine at 1.5 T. J Magn Reson Imaging 2021; 56:440-449. [PMID: 34953154 DOI: 10.1002/jmri.28044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Gadobutrol (GB) and gadoterate meglumine (GM) are contrast agents used for contrast-enhanced magnetic resonance angiography (CEMRA). Supraaortic vasculature (SAV) CEMRAs are used to evaluate stroke risk and neurologic symptoms. There is a need to compare the SAV CEMRA image quality obtained with GB and GM. PURPOSE To intra-individually compare MRA images obtained with equimolar GB and GM at 1.5 T in the SAV. STUDY TYPE Prospective, crossover. POPULATION Twenty-eight subjects (54 ± 13 years; 17 female). FIELD STRENGTH/SEQUENCE 1.5 T; three-dimensional (3D) gradient recalled echo. ASSESSMENT Quantitative image quality was measured by normalized signal intensity (SIn ) [SIn = SI blood/SD blood] and contrast ratio (CR) [CR = SI blood/SI muscle], determined by an observer (JWC) with 1 year of vascular imaging experience. Three radiologists (AS, PA, and MU) with (5, 5, and 6 years of) vascular imaging experience evaluated image quality by Likert-scale ratings (of image impression, wall conspicuity, and artifact absence). STATISTICAL TESTS SIn and CR were compared with paired t-tests or Wilcoxon signed-rank tests and Bland-Altman plots. Qualitative ratings were compared with Wilcoxon signed-rank test. RESULTS No significant difference in SIn was found between GB and GM. CRs with GB were significantly higher than GM at the right common carotid (6.9 ± 2.5 vs. 4.8 ± 1), left internal carotid (7.3 ± 2 vs. 4.4 ± 1.2), right internal carotid (7.7 ± 2.2 vs. 5 ± 1.1), and left vertebral (6.6 ± 2.2 vs. 4.5 ± 1.1) arteries. Bland-Altman plots showed relatively greater differences between GB and GM at higher CRs and SIn s. GM showed significantly higher artifact than GB (3.56 ± 0.52 vs. 3.36 ± 0.46) and significantly lower overall image quality (10.73 ± 1.45 vs. 11.26 ± 1.58) at the left vertebral artery. DATA CONCLUSION At 1.5 T and equimolar demonstration, GB (0.1 mL/kg, i.e., 0.1 mmol/kg) showed higher CRs in the SAV compared to GM (0.2 mL/kg, i.e., 0.1 mmol/kg) at most vessels. Subjective image quality was not significantly different between the two agents for most vessels. LEVEL OF EVIDENCE 2 TECHNICAL EFFICACY: Stage 2.
Collapse
Affiliation(s)
- John W Cerne
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Ashitha Pathrose
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Alyssa M Singer
- Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - Jackson E Moore
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.,Department of Biomedical Engineering, Northwestern University McCormick School of Engineering and Applied Science, Evanston, Illinois, USA
| | - Ali Serhal
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Pascale Aouad
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Muhammad Umair
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Ann Ragin
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Bradley D Allen
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Ryan Avery
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Michael Markl
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.,Department of Biomedical Engineering, Northwestern University McCormick School of Engineering and Applied Science, Evanston, Illinois, USA
| | - James C Carr
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.,Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| |
Collapse
|
3
|
Svarc P, Hagen T, Waltenburg H, Andersson C, Bläckberg M, Baco E, Taudorf M, Røder MA, Lindgren H, Kløw NE, Lönn LB. Center experience and other determinants of patient radiation exposure during prostatic artery embolization: a retrospective study in three Scandinavian centers. Eur Radiol 2021; 32:2404-2413. [PMID: 34786614 DOI: 10.1007/s00330-021-08351-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/19/2021] [Accepted: 09/21/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVES To evaluate the effects of center experience and a variety of patient- and procedure-related factors on patient radiation exposure during prostatic artery embolization (PAE) in three Scandinavian centers with different PAE protocols and levels of experience. Understanding factors that influence radiation exposure is crucial in effective patient selection and procedural planning. METHODS Data were collected retrospectively for 352 consecutive PAE procedures from January 2015 to June 2020 at the three centers. Dose area product (DAP (Gy·cm2)) was selected as the primary outcome measure of radiation exposure. Multiple patient- and procedure-related explanatory variables were collected and correlated with the outcome variable. A multiple linear regression model was built to determine significant predictors of increased or decreased radiation exposure as reflected by DAP. RESULTS There was considerable variation in DAP between the centers. Intended unilateral PAE (p = 0.03) and each 10 additional patients treated (p = 0.02) were significant predictors of decreased DAP. Conversely, increased patient body mass index (BMI, p < 0.001), fluoroscopy time (p < 0.001), and number of digital subtraction angiography (DSA) acquisitions (p < 0.001) were significant predictors of increased DAP. CONCLUSIONS To minimize patient radiation exposure during PAE radiologists may, in collaboration with clinicians, consider unilateral embolization, pre-interventional CTA for procedure planning, using predominantly anteroposterior (AP) projections, and limiting the use of cone-beam CT (CBCT) and fluoroscopy. KEY POINTS • Growing center experience and intended unilateral embolization decrease patient radiation exposure during prostatic artery embolization. • Patient BMI, fluoroscopy time, and number of DSA acquisitions are associated with increased DAP during procedures. • Large variation in radiation exposure between the centers may reflect the use of CTA before and CBCT during the procedure.
Collapse
Affiliation(s)
- Petra Svarc
- Department of Radiology, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 9, 2100, Copenhagen, Denmark. .,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2100, Copenhagen, Denmark.
| | - Thijs Hagen
- Department of Radiology and Nuclear Medicine, Oslo University Hospital, Kirkeveien 166, Oslo, Norway
| | - Hanne Waltenburg
- Radiation Protection, Danish Health Authority, Knapholm 7, 2730, Herlev, Denmark
| | - Christian Andersson
- Radiation Physics, Department of Hematology, Oncology and Radiation Physics, Helsingborg Hospital, Charlotte Yhlens gata 10, 252 23, Helsingborg, Sweden
| | - Mats Bläckberg
- Department of Urology, Helsingborg Hospital, Charlotte Yhlens gata 10, 252 23, Helsingborg, Sweden.,Department of Clinical Sciences, Faculty of Medicine, Lund University, Box 188, 221 00, Lund, Sweden
| | - Eduard Baco
- Department of Urology, Division of Surgery, Inflammation and Transplantation, Oslo University Hospital, Kirkeveien 166, Oslo, Norway
| | - Mikkel Taudorf
- Department of Radiology, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 9, 2100, Copenhagen, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2100, Copenhagen, Denmark
| | - Martin Andreas Røder
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2100, Copenhagen, Denmark.,Department of Urology, Rigshospitalet, Copenhagen Prostate Cancer Center, Blegdamsvej 9, 2100, Copenhagen, Denmark
| | - Hans Lindgren
- Department of Clinical Sciences, Faculty of Medicine, Lund University, Box 188, 221 00, Lund, Sweden.,Department of Surgery, Section of Interventional Radiology, Helsingborg Hospital, Charlotte Yhlens gata 10, 252 23, Helsingborg, Sweden
| | - Nils-Einar Kløw
- Department of Radiology and Nuclear Medicine, Oslo University Hospital, Kirkeveien 166, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Kirkeveien 166, Oslo, Norway
| | - Lars Birger Lönn
- Department of Radiology, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 9, 2100, Copenhagen, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2100, Copenhagen, Denmark
| |
Collapse
|
7
|
Sahani DV, Shah ZK, Catalano OA, Boland GW, Brugge WR. Radiology of pancreatic adenocarcinoma: current status of imaging. J Gastroenterol Hepatol 2008; 23:23-33. [PMID: 18171340 DOI: 10.1111/j.1440-1746.2007.05117.x] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Pancreatic adenocarcinoma is one of the leading causes of cancer death in the West, with a poor overall 5-year survival rate of only 4%. Late clinical presentation with an advanced disease results in a low rate of surgical intervention. Tumor serum marker CA 19-9 is sensitive, although not specific for the diagnosis of adenocarcinomas of the pancreas. The treatment approach is based on whether the tumor is resectable or non-resectable at presentation. Therefore, imaging plays a crucial role in the management of this disease. Many modalities are available to image the pancreas. They include non-invasive techniques, like ultrasound, contrast-enhanced multidetector computed tomography, magnetic resonance imaging and integrated positron emission tomography/computed tomography, and invasive techniques, like endoscopic retrograde cholangiopancreatography and endoscopic ultrasound. Each of these modalities has its peculiar strengths and weaknesses.
Collapse
Affiliation(s)
- Dushyant V Sahani
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
| | | | | | | | | |
Collapse
|
8
|
Aroua A, Rickli H, Stauffer JC, Schnyder P, Trueb PR, Valley JF, Vock P, Verdun FR. How to set up and apply reference levels in fluoroscopy at a national level. Eur Radiol 2006; 17:1621-33. [PMID: 17072616 DOI: 10.1007/s00330-006-0463-3] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2006] [Revised: 07/28/2006] [Accepted: 08/25/2006] [Indexed: 10/24/2022]
Abstract
A nationwide survey was launched to investigate the use of fluoroscopy and establish national reference levels (RL) for dose-intensive procedures. The 2-year investigation covered five radiology and nine cardiology departments in public hospitals and private clinics, and focused on 12 examination types: 6 diagnostic and 6 interventional. A total of 1,000 examinations was registered. Information including the fluoroscopy time (T), the number of frames (N) and the dose-area product (DAP) was provided. The data set was used to establish the distributions of T, N and the DAP and the associated RL values. The examinations were pooled to improve the statistics. A wide variation in dose and image quality in fixed geometry was observed. As an example, the skin dose rate for abdominal examinations varied in the range of 10 to 45 mGy/min for comparable image quality. A wide variability was found for several types of examinations, mainly complex ones. DAP RLs of 210, 125, 80, 240, 440 and 110 Gy cm2 were established for lower limb and iliac angiography, cerebral angiography, coronary angiography, biliary drainage and stenting, cerebral embolization and PTCA, respectively. The RL values established are compared to the data published in the literature.
Collapse
Affiliation(s)
- A Aroua
- University Institute of Applied Radiation Physics, Lausanne, Switzerland
| | | | | | | | | | | | | | | |
Collapse
|