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Papadogiannis P, Karavasilis E, Papathanasiou M, Seimenis I, Efstathopoulos E. MRI TEXTURE ANALYSIS AS A TOOL FOR DIAGNOSIS, ASSESSMENT AND MONITORING OF MULTIPLE SCLEROSIS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03153-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Dimakopoulou A, Karnachoriti M, Spyratou E, Seimenis I, Venetis S, Lambropoulou M, Efstathopoulos E, Kontos A. RAMAN SPECTRA OF HUMAN COLORECTAL TISSUES BY VARYING THE EXCITATION WAVELENGTHS FROM 514 NM TO 785 NM: DEFINING THE OPTIMUM LASER LINES FOR CANCER DETECTION. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03150-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Politakis D, Vagena I, Pippa N, Katifelis H, Gorgoulis V, Efstathopoulos E, Gazouli M, Lagopati N. PHOTOCATALYTIC ANTICANCER EFFECT OF TITANIUM DIOXIDE IN SILICO AND IN VITRO. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03074-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Avgoullas K, Ploussi A, Papagiannis I, Avramidis D, Tsoutsinos A, Maragou A, Efstathopoulos E, Seimenis I. EVALUATION OF ORGAN AND EFFECTIVE DOSES DURING PEDIATRIC RADIOFREQUENCY ABLATIONS USING DIFFERENT COMPUTATIONAL TOOLS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03114-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Avgoullas K, Ploussi A, Papagiannis I, Avramidis D, Tsoutsinos A, Maragou A, Efstathopoulos E, Seimenis I. EFFECTIVE DOSE AND CANCER RISK ESTIMATION IN PEDIATRIC PATIENTS UNDERGOING RADIOFREQUENCY CATHETER ABLATION FOR SUPRAVENTRICULAR TACHYCARDIA TREATMENT. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03113-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Spyratou E, Kokinogoulis K, Tsigaridas G, Makropoulou M, Efstathopoulos E. NOVEL THERANOSTICS IN CANCER TREATMENT: THE MARRIAGE BETWEEN IONIZING AND NON-IONIZING RADIATION INTERPLAY VIA CHERENKOV RADIATION. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03146-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Karnachoriti M, Spyratou E, Orphanoudakis S, Lambropoulou M, Seimenis I, Efstathopoulos E, Raptis Y, Kontos A. RAMAN SCATTERING AS A TOOL FOR DIAGNOSIS OF COLORECTAL CANCER CURRENT STATUS AND PRACTICAL EXPERIMENTAL SOLUTIONS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03018-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Kouri M, Spyratou E, Benetis S, Seimenis I, Kontos A, Lambropoulou M, Efstathopoulos E. ADVANCED RAMAN SPECTROSCOPY: A ‘‘GUIDING LIGHT’’ TOWARDS CANCER DIAGNOSIS AND SURGERY. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03017-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Kouri M, Zervoudi E, Psyrri A, Efstathopoulos E, Spyratou E. EXPERIMENTAL STUDY ON THE EFFECTS OF GOLD NANOPARTICLES USES ON THE THERAPEUTIC RESULT FOLLOWING RADIOTHERAPY IN CERVICAL CANCER CELL LINES. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03075-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Rallis S, Ploussi A, Efstathopoulos E. A REVIEW ON CHEST CT PROTOCOLS FOR COVID-19 IN PREGNANT PATIENTS AND PEDIATRICS. Phys Med 2022. [PMCID: PMC9764527 DOI: 10.1016/s1120-1797(22)03110-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Vagena I, Politakis D, Katifelis H, Gatou M, Pavlatou E, Efstathopoulos E, Gazouli M, Lagopati N. BIOLOGICAL EFFECT OF PHOTOCATALYTIC NANOPARTICLES. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03182-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Stathopoulos I, Stoklasa R, Tsochatzis A, Velonakis G, Karavasilis E, Efstathopoulos E, Serio L. BRAIN LESIONS SCREENING TOOL BASED ON DEEP LEARNING. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03066-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Bizimi V, Plousi A, Tseronis D, Katsimbri P, Sideri N, Efstathopoulos E, Boumpas D, Papakonstantinou O, Kelekis N. Spinal and Pelvic MDCT using “iDose5” Iterative Reconstruction Algorithm in Patients with Psoriatic Spondyloarthritis: Diagnostic Capabilities and Image Quality in Relation to Radiation Exposure. Semin Musculoskelet Radiol 2022. [DOI: 10.1055/s-0042-1750666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Diamantopoulos S, Platoni K, Karaiskos P, Kouloulias V, Efstathopoulos E. A novel isodose surface-based method for patient specific QA analysis. Phys Med 2021. [DOI: 10.1016/s1120-1797(22)00326-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Spiliopoulos S, Reppas L, Zompola C, Palaiodimou L, Papadopoulou M, Filippiadis D, Palialexis K, Ploussi A, Efstathopoulos E, Tsivgoulis G, Brountzos E. Computed-tomography-guided transforaminal intrathecal nusinersen injection in adults with spinal muscular atrophy type 2 and severe spinal deformity. Feasibility, safety and radiation exposure considerations. Eur J Neurol 2020; 27:1343-1349. [PMID: 32250518 DOI: 10.1111/ene.14245] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 03/23/2020] [Accepted: 03/26/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND PURPOSE The purpose was to investigate our centre's experience on computed-tomography-guided (CT-guided), transforaminal, intrathecal administration of nusinersen in adult subjects with spinal muscular atrophy (SMA) type 2 and severe spinal deformity. METHOD This is a retrospective, single-centre study investigating the feasibility and safety of CT-guided, transforaminal, lumbar puncture for the intrathecal administration of nusinersen (Spinranza®; Biogen; Cambridge, MA, USA) in a cohort of adult subjects with SMA type 2, severe neuromuscular scoliosis and previous spinal surgery. Between January 2019 and October 2019, five male, adult, SMA type 2 subjects were eligible to be treated in our centre with nusinersen. The mean age of the patients was 31 ± 9 years (range 19-43 years). The study's outcome measures were technical success, adverse events and radiation exposure. RESULTS In total, four patients completed the four loading doses, whilst the fifth patient received only one loading dose; two patients also received their first maintenance doses. Overall, 20 consecutive transforaminal, intrathecal treatments were analysed. Technical success was 100% (20/20 intrathecal infusions). No adverse events were documented following the procedures. Mean dose-length product (DLP) value per injection was 665.4 ± 715.5 mGy*cm. Estimated mean effective dose per injection was 12.7 ± 12.9 mSv. Subgroup analysis between the chronologically first 10 versus subsequent 10 procedures demonstrated a clear trend towards less radiation exposure in the latter, although this difference did not reach statistical significance (DLP: 984.7 ± 903.3 vs. 436.7 ± 321.5 mGy*cm, P = 0.165; respectively). CONCLUSIONS In this retrospective series, CT-guided transforaminal access for intrathecal injection of nusinersen was proven feasible and safe. A decrease in radiation dose over time was noted. Protocols to minimize radiation exposure are essential.
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Affiliation(s)
- S Spiliopoulos
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
| | - L Reppas
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
| | - C Zompola
- Second Department of Neurology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University Hospital, Athens, Greece
| | - L Palaiodimou
- Second Department of Neurology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University Hospital, Athens, Greece
| | - M Papadopoulou
- Second Department of Neurology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University Hospital, Athens, Greece
| | - D Filippiadis
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
| | - K Palialexis
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
| | - A Ploussi
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
| | - E Efstathopoulos
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
| | - G Tsivgoulis
- Second Department of Neurology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University Hospital, Athens, Greece
| | - E Brountzos
- Second Department of Radiology, Division of Interventional Radiology, School of Medicine, National and Kapodistrian University of Athens, 'Attikon' University General Hospital, Athens, Greece
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Pappas E, Kalaitzakis G, Boursianis T, Zoros E, Zourari K, Pappas EP, Makris D, Seimenis I, Efstathopoulos E, Maris TG. Dosimetric performance of the Elekta Unity MR-linac system: 2D and 3D dosimetry in anthropomorphic inhomogeneous geometry. ACTA ACUST UNITED AC 2019; 64:225009. [DOI: 10.1088/1361-6560/ab52ce] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Makris DN, Pappas EP, Zoros E, Papanikolaou N, Saenz DL, Kalaitzakis G, Zourari K, Efstathopoulos E, Maris TG, Pappas E. Characterization of a novel 3D printed patient specific phantom for quality assurance in cranial stereotactic radiosurgery applications. Phys Med Biol 2019; 64:105009. [PMID: 30965289 DOI: 10.1088/1361-6560/ab1758] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In single-isocenter stereotactic radiosurgery/radiotherapy (SRS/SRT) intracranial applications, multiple targets are being treated concurrently, often involving non-coplanar arcs, small photon beams and steep dose gradients. In search for more rigorous quality assurance protocols, this work presents and evaluates a novel methodology for patient-specific pre-treatment plan verification, utilizing 3D printing technology. In a patient's planning CT scan, the external contour and bone structures were segmented and 3D-printed using high-density bone-mimicking material. The resulting head phantom was filled with water while a film dosimetry insert was incorporated. Patient and phantom CT image series were fused and inspected for anatomical coherence. HUs and corresponding densities were compared in several anatomical regions within the head. Furthermore, the level of patient-to-phantom dosimetric equivalence was evaluated both computationally and experimentally. A single-isocenter multi-focal SRS treatment plan was prepared, while dose distributions were calculated on both CT image series, using identical calculation parameters. Phantom- and patient-derived dose distributions were compared in terms of isolines, DVHs, dose-volume metrics and 3D gamma index (GI) analysis. The phantom was treated as if the real patient and film measurements were compared against the patient-derived calculated dose distribution. Visual inspection of the fused CT images suggests excellent geometric similarity between phantom and patient, also confirmed using similarity indices. HUs and densities agreed within one standard deviation except for the skin (modeled as 'bone') and sinuses (water-filled). GI comparison between the calculated distributions resulted in passing rates better than 97% (1%/1 mm). DVHs and dose-volume metrics were also in satisfying agreement. In addition to serving as a feasibility proof-of-concept, experimental absolute film dosimetry verified the computational study results. GI passing rates were above 90%. Results of this work suggest that employing the presented methodology, patient-equivalent phantoms (except for the skin and sinuses areas) can be produced, enabling literally patient-specific pre-treatment plan verification in intracranial applications.
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Affiliation(s)
- D N Makris
- Medical Physics Laboratory, Medical School, National and Kapodistrian University of Athens, Athens 115 27, Greece
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Diamantopoulos S, Kagkiouzis I, Patatoukas G, Kypraiou E, Kouloulias V, Efstathopoulos E, Platoni K. Three dimensional printed electron beam modifier for total skin electron treatments. Med Dosim 2018; 44:173-178. [PMID: 31079619 DOI: 10.1016/j.meddos.2018.05.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 05/06/2018] [Accepted: 05/18/2018] [Indexed: 11/30/2022]
Abstract
Total Skin Electron Beam (TSEB) treatment, despite its proven effectiveness in skin malignancies, is a rather exhausting irradiation method, especially for feeble patients. In an effort to reduce treatment time by creating a clinically acceptable single TSEB field, various beam modifiers of different materials and shapes were tested. Using the TSEB immobilization device of our department and 3D printing technology, aluminum and thermoplastic modifiers were designed and constructed, according to the resulting profiles at treatment distance. Electron beam characteristics were measured and calculated both at SSD = 100 cm and at treatment level. Aluminum scatterers of the same thickness caused different modification according to the area of blocking. Aluminum modifiers reduced significantly central dose deposition for the same amount of MUs and therefore they expanded treatment time in undesirable levels. Plastic modifiers offer a good combination of field dimensions and treatment time. The final 3D printed modifier shaped the electron beam as desired resulting to a clinically acceptable 6 MeV field of 176 × 70 cm field with 10% inhomogeneity in vertical and 3% in the lateral dimension with adequate skin coverage at SSD = 400 cm. This modification offered approximately a two-minute treatment time reduction compared to the current technique. Underdosed areas appear near the edge of the field, but in regions that are far from the torso of the patient. Bremsstrahlung radiation was kept at clinically accepted levels (< 5%). This modification of the original six dual-field technique of our hospital could probably benefit fragile patients who could not easily tolerate a twenty-minute standing position without compromising the quality of their treatment.
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Affiliation(s)
- S Diamantopoulos
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece.
| | - I Kagkiouzis
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece
| | - G Patatoukas
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece
| | - E Kypraiou
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece
| | - V Kouloulias
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece
| | - E Efstathopoulos
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece
| | - K Platoni
- 2nd Department of Radiology, Radiotherapy Unit, University General Hospital "Attikon", National and Kapodistrian University of Athens, Greece, 1 Rimini str., 12462 Chaidari, Greece
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Kalaitzakis G, Papanikolaou N, Boursianis T, Pappas E, Lahanas V, Makris D, Stathakis S, Watts L, Efstathopoulos E, Maris T, Pappas E. A quality assurance test for the validation of the spatial and dosimetric accuracy of a new technique for the treatment of multiple brain mestastases. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Vlastou E, Antonakos J, Simeonidou E, Flevari P, Leftheriotis D, Deftereos S, Efstathopoulos E. Patient effective dose during pacemaker implantation at a flat panel and image intensifier angiography system. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Vlastou E, Antonakos J, Efstathopoulos E, Kafkas N, Makris N, Besios C, Raptou P. A comparison of dose area product from different angiography procedures. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Tsionopoulou P, Kordolaimi S, Athanasakos T, Sideri N, Papakonstantinou O, Sakellaropoulos G, Nikiforidis G, Efstathopoulos E. Dose comparison of two imaging techniques for the detection of myeloma lesions. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Pappas E, Papanikolaou N, Gutierrez A, Kirby N, Mavroidis P, Efstathopoulos E, Makris D, Crownover R, Stathakis S. SU-E-T-80: A Study of the Effect of Dose Grid Resolution On Stereotactic Plan Evaluation as a Function of Target Size. Med Phys 2015. [DOI: 10.1118/1.4924441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Arapakis I, Efstathopoulos E, Tsitsia V, Kordolaimi S, Economopoulos N, Argentos S, Ploussi A, Alexopoulou E. Using "iDose4" iterative reconstruction algorithm in adults' chest-abdomen-pelvis CT examinations: effect on image quality in relation to patient radiation exposure. Br J Radiol 2014; 87:20130613. [PMID: 24646183 PMCID: PMC4067031 DOI: 10.1259/bjr.20130613] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 01/14/2014] [Accepted: 02/12/2014] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE The aim of this study is to examine the effect of iDose4 hybrid iterative reconstruction algorithm (Philips Healthcare, Cleveland, OH) on radiation dose and image quality in chest–abdomen–pelvis (CAP) CT scanning of adult patients. METHODS CAP CT examinations were performed on 99 patients with the use of the “old standard” protocol performing filtered back projection reconstruction algorithm (FBP protocol) and on 84 patients with the use of iDose4 protocol on a 64-multidetector CT. Patients were subdivided into three weight groups (Group 1, 41–60kg; Group 2, 61–90kg; and Group 3, .90kg). Volume CT dose index and dose length product (DLP) were recorded, while effective dose was calculated from DLP measurements. Objective image noise, signal-to-noise ratio and contrast-to-noise ratio were calculated. Two radiologists reviewed images to evaluate image quality. RESULTS Compared with the FBP protocol, there was an overall 46.5% significant decrease in effective dose with the use of iDose4 protocol. CONCLUSION Objective image quality was higher in iDose4 images than in FBP images. Subjective image noise, sharpness, contrast and diagnostic confidence scores tended to be better for iDose4 protocol at the decreased radiation exposure level. Artefacts were minor for both protocols. ADVANCES IN KNOWLEDGE Our results suggest that the iterative acquisition protocol provides great potential for reducing radiation exposure and maintaining or improving image quality in CAP CT examinations.
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Benezi S, Karavasilis E, Karanasiou I, Matsopoulos G, Ventouras E, Ouzounoglou N, Kouloulias V, Papathanasiou M, Foteineas A, Soldatos T, Iosif C, Efstathopoulos E, Kelekis N, Kelekis D. Tract – based spatial statistics in patients with small cell lung cancer. Phys Med 2014. [DOI: 10.1016/j.ejmp.2014.07.250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Raptou P, Pantos I, Voulalas G, Maltezos C, Kokkinis K, Efstathopoulos E. Patient and occupational radiation doses from aortic aneurysm endovascular repair. Phys Med 2014. [DOI: 10.1016/j.ejmp.2014.07.279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Diamantopoulos S, Platoni K, Dilvoi M, Nazos I, Geropantas K, Maravelis G, Tolia M, Beli I, Efstathopoulos E, Pantelakos P, Panayiotakis G, Kouloulias V. Clinical implementation of total skin electron beam (TSEB) therapy: A review of the relevant literature. Phys Med 2011; 27:62-8. [DOI: 10.1016/j.ejmp.2010.09.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 07/15/2010] [Accepted: 09/01/2010] [Indexed: 10/18/2022] Open
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Kelekis NL, Efstathopoulos E, Balanika A, Spyridopoulos TN, Pelekanou A, Kanni T, Savva A, Brountzos E, Giamarellos-Bourboulis EJ. Ultrasound aids in diagnosis and severity assessment of hidradenitis suppurativa. Br J Dermatol 2010; 162:1400-2. [PMID: 20184586 DOI: 10.1111/j.1365-2133.2010.09710.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Katritsis D, Efstathopoulos E, Betsou S, Korovesis S, Faulkner K, Panayiotakis G, Webb-Peploe MM. Radiation exposure of patients and coronary arteries in the stent era: A prospective study. Catheter Cardiovasc Interv 2000; 51:259-64. [PMID: 11066101 DOI: 10.1002/1522-726x(200011)51:3<259::aid-ccd2>3.0.co;2-i] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Previous studies have investigated the radiation dose to doctors and patients during coronary angiography and angioplasty, but most of them were retrospective, conducted in the prestent era, and results have not been consistent. Effective dose of 57 patients undergoing coronary angiography and/or angioplasty was assessed by using a dose-area product (DAP) to effective dose conversion factor. Radiation exposure risks to patients were then calculated for each procedure. Thermoluminescent dosimeters, mounted on a specially designed catheter that was advanced to the left or right sinus of Valsalva, were used to measure the dose received by the coronary arteries. Mean effective dose received by patients were 5.0 +/- 0.5 mSv for coronary angiography, 6.6 +/- 1.0 mSv for angioplasty, 10.2 +/- 1.5 mSv for angioplasty followed by stent implantation, 13.6 +/- 2.5 mSv for angiography followed by ad hoc angioplasty, and 16.7 +/- 2.8 mSv for angiography followed by ad hoc angioplasty and stent implantation. Patient risk of developing cancer after each procedure was 0.025%, 0.033%, 0.051%, 0.068%, and 0.084%, respectively. Corresponding mean coronary irradiation doses were 24 +/- 2.5, 31.0 +/- 3.6, 43.6 +/- 7.2, 55.0 +/- 7.5, and 64.7 +/- 5.6 mGy, respectively. A linear relationship of the DAP and the dose at the coronary arteries was found: DAP = 1,273 (cm(2)) x coronary dose (mGy). Radiation exposure to coronary arteries and associated risk to patients are relatively low, even following complicated, multivessel angioplasty with stent implantation. Our method can be used for calculation of radiation risk to patients and radiation dose to coronary arteries by using external dosimeters. Cathet. Cardiovasc. Intervent. 51:259-264, 2000.
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Affiliation(s)
- D Katritsis
- Department of Cardiology, Athens Euroclinic, Athens, Greece.
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Manginas A, Efstathopoulos E, Salvaras N, Voudris V, Pavlides G, Cokkinos DV. Intracoronary irradiation and stent placement in a chronic total coronary occlusion: long-term clinical, angiographic, and intracoronary ultrasound follow-up. Catheter Cardiovasc Interv 2000; 51:199-202. [PMID: 11025576 DOI: 10.1002/1522-726x(200010)51:2<199::aid-ccd14>3.0.co;2-i] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Intracoronary irradiation emerges as a promising method in a variety of restenosis prone coronary lesions. We report the acute and long-term clinical, angiographic, and ICUS follow-up of a patient who underwent a successful angioplasty with stent placement in a chronic coronary occlusion with adjuvant gamma-intracoronary radiation.
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Affiliation(s)
- A Manginas
- First Department of Cardiology, Onassis Cardiac Surgery Center, Athens, Greece
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