1
|
Rep S, Jensterle L, Zdešar U, Zaletel K, Tomše P, Ležaič L. Contribution of CT scan to patient's radiation exposure in parathyroid SPECT/CT scintigraphy. Radiography (Lond) 2024; 30:995-1000. [PMID: 38688163 DOI: 10.1016/j.radi.2024.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/11/2024] [Accepted: 04/11/2024] [Indexed: 05/02/2024]
Abstract
INTRODUCTION Dual phase technetium-99mTc-methoxy isobutyl isonitrile (MIBI) single-photon emission computed tomography with computed tomography (SPECT/CT) may be the most accurate conventional imaging approach for localization of enlarged parathyroid gland (EPG). The imaging is based on the radiopharmaceutical (RP) retention in EPG compared to washout from normal thyroid and normal parathyroid glands. This study aimed to estimate and optimize the contribution of computed tomography (CT) scan and scan range to effective dose (ED) in dual-phase MIBI SPECT/CT parathyroid scintigraphy. METHODS The study included seventy-four patients; thirty-seven with reduced and thirty-seven with extended CT scan range. The ED caused by the CT scan was calculated using Dose Length Product (DLP) data and estimated using the Imaging Performance Assessment of CT scanners (ImPACT) calculator. RESULTS For all patients, the contribution of CT to the ED in a combined SPECT/CT examination was 2.62 ± 0.29 mSv (48%). The contribution of CT to the total ED was 1.8 ± 0.18 mSv (33%) when using reduced and 3.44 ± 0.23 mSv (64%) when using extended scan range. The DLP and ED were statistically significantly different between the reduced and extended CT scan range (p < 0.001) in the first and second phases. The individual organ dose was reduced from 8% to 94%. CONCLUSION The hybrid SPECT/CT improves the interpretation of nuclear medicine images and also increases the radiation dose to the patient. An adequately defined CT scan range on SPECT/CT imaging, can significantly reduce a patient's ED. IMPLICATIONS FOR PRACTICE The research findings showed that knowledge of anatomy, pathology and technology can provide optimising diagnostic procedures and reduce patient ED after SPECT/CT scans.
Collapse
Affiliation(s)
- S Rep
- Department of Nuclear Medicine, University Medical Centre Ljubljana, Slovenia; University of Ljubljana, Faculty of Health Sciences, Slovenia.
| | - L Jensterle
- Department of Nuclear Medicine, University Medical Centre Ljubljana, Slovenia
| | - U Zdešar
- Institute of Occupational Safety, Ljubljana, Slovenia
| | - K Zaletel
- Department of Nuclear Medicine, University Medical Centre Ljubljana, Slovenia; Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - P Tomše
- Department of Nuclear Medicine, University Medical Centre Ljubljana, Slovenia
| | - L Ležaič
- Department of Nuclear Medicine, University Medical Centre Ljubljana, Slovenia; Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| |
Collapse
|
2
|
Karunaratne D, Karunaratne N, Vasanthan R, Ojofeitimi O, Owens E, Sathiskumar P, Till D, Kirkland P, Howlett D. Primary Hyperparathyroidism: Outcomes of Repeated Imaging After Initial Negative Radiological Localization. Cureus 2023; 15:e42889. [PMID: 37664265 PMCID: PMC10474611 DOI: 10.7759/cureus.42889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2023] [Indexed: 09/05/2023] Open
Abstract
BACKGROUND Radiological localization imaging aids in the identification of abnormal parathyroid glands resulting in primary hyperparathyroidism (PHPT), thereby facilitating minimally invasive parathyroid surgery. Sometimes initial imaging may fail to identify the abnormal gland and imaging may therefore be repeated. This study explored patient outcomes of repeated parathyroid localization imaging, after initial negative gland localization, at a United Kingdom institution. METHODOLOGY Data was retrospectively collected and analyzed for patients with PHPT undergoing repeated imaging during a five-year period (2015-2020). The total number of episodes of scanning, types of scans performed, the time interval between scans and the imaging success of gland localization were recorded. We explored the reasons for repeated imaging and attempted to identify any factors that might predict subsequent positive radiological localization. RESULTS A total of 45 patients were identified who underwent repeated localizing imaging after first localizing imaging was negative. Of these, 39 did not undergo surgery despite repeat imaging being undertaken; 11 out of these 39 patients (28%) had subsequent positive localization scans. Again, a large proportion of patients were managed conservatively, despite the repeated sets of imaging being done. Patients undergoing three or four sets of repetitive imaging did not have imaging or surgical success. CONCLUSION A streamlined parathyroid pathway should be followed whereby patients should be triaged for suitability for surgery prior to repeated imaging. A second set of scans should be offered when patients are unsuitable for conservative management and are willing and fit to undergo surgery. There is no merit to repeating imaging more than twice.
Collapse
Affiliation(s)
| | | | - Rishi Vasanthan
- Otolaryngology - Head and Neck Surgery, Leicester Royal Infirmary, Leicester, GBR
| | - Oluwamayowa Ojofeitimi
- General Internal Medicine, Conquest Hospital, East Sussex Healthcare NHS Trust, St. Leonards-on-Sea, GBR
| | - Emma Owens
- Radiology, Eastbourne Hospital, East Sussex Healthcare NHS Trust, Eastbourne, GBR
| | - Periasamy Sathiskumar
- Diabetes and Endocrinology, Conquest Hospital, East Sussex Healthcare NHS Trust, St. Leonards-on-Sea, GBR
| | - David Till
- Endocrinology, Eastbourne Hospital, East Sussex Healthcare NHS Trust, Eastbourne, GBR
| | - Paul Kirkland
- Otolaryngology - Head and Neck Surgery, Eastbourne Hospital, East Sussex Healthcare NHS Trust, Eastbourne, GBR
| | - David Howlett
- Interventional Radiology, Eastbourne Hospital, East Sussex Healthcare NHS Trust, Eastbourne, GBR
| |
Collapse
|
3
|
Dimitroukas CP, Metaxas V, Efthymiou F, Zampakis P, Kalogeropoulou C, Panayiotakis G. Organs' absorbed dose and comparison of different methods for effective dose calculation in computed tomography of parathyroid glands. Biomed Phys Eng Express 2022; 8. [PMID: 35593909 DOI: 10.1088/2057-1976/ac7169] [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: 02/11/2022] [Accepted: 05/19/2022] [Indexed: 11/12/2022]
Abstract
Objective:To estimate organs' absorbed dose from the two-phase CT of parathyroid glands, effective dose (ED) based on three different methods, and compare the dose values with those reported by other published protocols.Methods:Volumetric-computed-tomography-dose-index (CTDIvol), dose-length-product (DLP), and the corresponding scan length during each phase of a parathyroid protocol were recorded, for seventy-six patients. One k-factor, and two different k-factors for the neck and chest area were used to estimate the ED from DLP. A Monte Carlo software, VirtualDoseCT, was also used for the estimation of organs' absorbed dose and ED.Results:Two-phase parathyroid CT resulted in a mean ED of 3.93 mSv, 4.29 mSv and 4.21 mSv according to the one k-factor, two k-factors, and VirtualDoseCT methods, respectively. The two k-factors method resulted in a slight overestimation of 1.9% in total ED compared to VirtualDoseCT. No statistically significant difference was found in ED values between these methods (Wilcoxon test, p>0.05), except for female patients in the pre-contrast phase. The organs inside the SFOV received the following doses: thymus 23.3 mGy, lungs 11.5 mGy, oesophagus 9.2 mGy, thyroid 6.9 mGy, and breast 6.3 mGy. The ED and organs' dose (OD) values were significantly lower in the pre-contrast than in the arterial phase (Wilcoxon test, p<0.001). A statistically significant difference was observed between male and female patients for the pre-contrast phase (Mann-Whitney test, p<0.05), regarding the ED values obtained with the two k-factors method and VirtualDoseCT software.Conclusions:The two k-factors method could be applied for the ED estimation in clinical practice, if appropriate software is not available. An extensive range of ED values derived from the literature, mainly depending on the acquisition protocol parameters and the estimation method.
Collapse
Affiliation(s)
- Christos P Dimitroukas
- Department of Medical Physics, University of Patras, School of Medicine, Patra, 26504, GREECE
| | - Vasileios Metaxas
- University of Patras, Department of Medical Physics, Patra, Periféria Dhitikís Elládh, 26504, GREECE
| | - Fotios Efthymiou
- University of Patras, Department of Medical Physics, Patra, Periféria Dhitikís Elládh, 26504, GREECE
| | - Petros Zampakis
- Department of Radiology, University of Patras, School of Medicine, Patra, Periféria Dhitikís Elládh, 26504, GREECE
| | - Christina Kalogeropoulou
- Department of Radiology, University of Patras, School of Medicine, Patra, Periféria Dhitikís Elládh, 26504, GREECE
| | - George Panayiotakis
- Department of Medical Physics, University of Patras, School of Medicine, Patra, 26504, GREECE
| |
Collapse
|
4
|
Morris MA, Saboury B, Ahlman M, Malayeri AA, Jones EC, Chen CC, Millo C. Parathyroid Imaging: Past, Present, and Future. Front Endocrinol (Lausanne) 2022; 12:760419. [PMID: 35283807 PMCID: PMC8914059 DOI: 10.3389/fendo.2021.760419] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/21/2021] [Indexed: 12/30/2022] Open
Abstract
The goal of parathyroid imaging is to identify all sources of excess parathyroid hormone secretion pre-operatively. A variety of imaging approaches have been evaluated and utilized over the years for this purpose. Ultrasound relies solely on structural features and is without radiation, however is limited to superficial evaluation. 4DCT and 4DMRI provide enhancement characteristics in addition to structural features and dynamic enhancement has been investigated as a way to better distinguish parathyroid from adjacent structures. It is important to recognize that 4DCT provides valuable information however results in much higher radiation dose to the thyroid gland than the other available examinations, and therefore the optimal number of phases is an area of controversy. Single-photon scintigraphy with 99mTc-Sestamibi, or dual tracer 99mTc-pertechnetate and 99mTc-sestamibi with or without SPECT or SPECT/CT is part of the standard of care in many centers with availability and expertise in nuclear medicine. This molecular imaging approach detects cellular physiology such as mitochondria content found in parathyroid adenomas. Combining structural imaging such as CT or MRI with molecular imaging in a hybrid approach allows the ability to obtain robust structural and functional information in one examination. Hybrid PET/CT is widely available and provides improved imaging and quantification over SPECT or SPECT/CT. Emerging PET imaging techniques, such as 18F-Fluorocholine, have the exciting potential to reinvent parathyroid imaging. PET/MRI may be particularly well suited to parathyroid imaging, where available, because of the ability to perform dynamic contrast-enhanced imaging and co-registered 18F-Fluorocholine PET imaging simultaneously with low radiation dose to the thyroid. A targeted agent specific for a parathyroid tissue biomarker remains to be identified.
Collapse
Affiliation(s)
| | | | | | | | | | - Clara C. Chen
- National Institutes of Health (NIH) Clinical Center, Department of Radiology and Imaging Sciences, Bethesda, MD, United States
| | - Corina Millo
- National Institutes of Health (NIH) Clinical Center, Department of Radiology and Imaging Sciences, Bethesda, MD, United States
| |
Collapse
|
5
|
Miller JA, Gundara J, Harper S, Herath M, Ramchand SK, Farrell S, Serpell J, Taubman K, Christie J, Girgis CM, Schneider HG, Clifton-Bligh R, Gill AJ, De Sousa SMC, Carroll RW, Milat F, Grossmann M. Primary hyperparathyroidism in adults-(Part II) surgical management and postoperative follow-up: Position statement of the Endocrine Society of Australia, The Australian & New Zealand Endocrine Surgeons, and The Australian & New Zealand Bone and Mineral Society. Clin Endocrinol (Oxf) 2021. [PMID: 34927274 DOI: 10.1111/cen.14650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To develop evidence-based recommendations to guide the surgical management and postoperative follow-up of adults with primary hyperparathyroidism. METHODS Representatives from relevant Australian and New Zealand Societies used a systematic approach for adaptation of guidelines (ADAPTE) to derive an evidence-informed position statement addressing eight key questions. RESULTS Diagnostic imaging does not determine suitability for surgery but can guide the planning of surgery in suitable candidates. First-line imaging includes ultrasound and either parathyroid 4DCT or scintigraphy, depending on local availability and expertise. Minimally invasive parathyroidectomy is appropriate in most patients with concordant imaging. Bilateral neck exploration should be considered in those with discordant/negative imaging findings, multi-gland disease and genetic/familial risk factors. Parathyroid surgery, especially re-operative surgery, has better outcomes in the hands of higher volume surgeons. Neuromonitoring is generally not required for initial surgery but should be considered for re-operative surgery. Following parathyroidectomy, calcium and parathyroid hormone levels should be re-checked in the first 24 h and repeated early if there are risk factors for hypocalcaemia. Eucalcaemia at 6 months is consistent with surgical cure; parathyroid hormone levels do not need to be re-checked in the absence of other clinical indications. Longer-term surveillance of skeletal health is recommended. CONCLUSIONS This position statement provides up-to-date guidance on evidence-based best practice surgical and postoperative management of adults with primary hyperparathyroidism.
Collapse
Affiliation(s)
- Julie A Miller
- Department of Surgery, The Royal Melbourne Hospital, Melbourne, Victoria, Australia
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Endocrine Surgical Centre, Epworth Hospital Network, Richmond, Victoria, Australia
| | - Justin Gundara
- Department of Surgery, Redland Hospital, Metro South and Faculty of Medicine, University of Queensland, Saint Lucia, Queensland, Australia
- Department of Surgery, Logan Hospital, Metro South and School of Medicine and Dentistry, Griffith University, Nathan, Queensland, Australia
| | - Simon Harper
- Department of General Surgery, Wellington Regional Hospital, Wellington, New Zealand
- Department of Surgery, University of Otago, Wellington, New Zealand
| | - Madhuni Herath
- Department of Endocrinology, Monash Health, Clayton, Victoria, Australia
- Centre for Endocrinology & Metabolism, Hudson Institute of Medical Research, Clayton, Victoria, Australia
- Department of Medicine, Nursing & Health Sciences, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
| | - Sabashini K Ramchand
- Department of Endocrinology, Austin Health, Heidelberg, Victoria, Australia
- Department of Medicine, Austin Health, University of Melbourne, Melbourne, Victoria, Australia
| | - Stephen Farrell
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Department of Surgery, St Vincent's Hospital, Fitzroy, Victoria, Australia
- Department of Surgery, Austin Health, Heidelberg, Victoria, Australia
- Department of Surgery, Royal Children's Hospital, Parkville, Victoria, Australia
| | - Jonathan Serpell
- Department of General Surgery, The Alfred Hospital, Melbourne, Victoria, Australia
- Department of Endocrine Surgery, Monash University, Victoria, Clayton, Australia
| | - Kim Taubman
- Department of Medical Imaging, St Vincent's Hospital, Fitzroy, Victoria, Australia
- Department of Endocrinology, St Vincent's Hospital, Fitzroy, Victoria, Australia
- Department of Medicine, University of Melbourne, Melbourne, Victoria, Australia
| | - James Christie
- PRP Diagnostic Imaging, Sydney, New South Wales, Australia
| | - Christian M Girgis
- Department of Diabetes and Endocrinology, Westmead Hospital, New South Wales, Australia
- Department of Endocrinology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
| | - Hans G Schneider
- Clinical Biochemistry Unit, Alfred Pathology Service, Alfred Health, Melbourne, Victoria, Australia
- Department of Endocrinology, Alfred Hospital, Melbourne, Victoria, Australia
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Clayton, Victoria, Australia
| | - Roderick Clifton-Bligh
- Department of Endocrinology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
- Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
- Kolling Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Anthony J Gill
- Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
- Cancer Diagnosis and Pathology Group, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, New South Wales, Australia
- NSW Health Pathology, Department of Anatomical Pathology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
| | - Sunita M C De Sousa
- Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide, South Australia, Australia
- South Australian Adult Genetics Unit, Royal Adelaide Hospital, Adelaide, South Australia, Australia
- Adelaide Medical School, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, South Australia, Australia
| | - Richard W Carroll
- Endocrine, Diabetes, and Research Centre, Wellington Regional Hospital, Wellington, New Zealand
| | - Frances Milat
- Department of Endocrinology, Monash Health, Clayton, Victoria, Australia
- Centre for Endocrinology & Metabolism, Hudson Institute of Medical Research, Clayton, Victoria, Australia
- Department of Medicine, Nursing & Health Sciences, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
| | - Mathis Grossmann
- Department of Endocrinology, Austin Health, Heidelberg, Victoria, Australia
- Department of Medicine, Austin Health, University of Melbourne, Melbourne, Victoria, Australia
| |
Collapse
|
6
|
Dimitroukas CP, Metaxas VI, Efthymiou FO, Zampakis PE, Kalogeropoulou CP, Panayiotakis GS. DOSIMETRIC EVALUATION OF THE TWO-PHASE COMPUTED TOMOGRAPHY IN PARATHYROID GLANDS IMAGING. RADIATION PROTECTION DOSIMETRY 2021; 196:207-219. [PMID: 34635914 DOI: 10.1093/rpd/ncab137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 07/03/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
This study evaluates the patient radiation dose from the two-phase protocols of two different computed tomography (CT) systems and compares this with that delivered by the other similar protocols previously published. Two hundred and fourteen patients with primary hyperparathyroidism were included in the study with a two-phase CT scan between 2008 and 2020 by using a Toshiba Aquilion Prime 80 and a GE Light Speed 16. The standard 'neck' or a modified 'parathyroid' protocol was used. The patient dose was evaluated in terms of volumetric computed tomography dose index (CTDIvol), dose length product (DLP) and effective dose (ED) per acquisition protocol and CT system. CTDIvol and DLP were recorded retrospectively, while the ED was calculated based on DLP and an appropriate conversion coefficient. Comparisons of patient dose between the two protocols and two CT systems and the corresponding published values were established. A significantly lower patient dose (40.2-43.2%) than the GE system (p < 0.0001) resulted from the Toshiba system. The 'parathyroid' protocol resulted in a 6.5-9.6% lower patient dose than the standard 'neck' protocol. Compared with the literature, the lowest ED value (3.6 mSv) was observed since this protocol consists of a lowered tube voltage of 100 kVp, a reduced scan length for the pre-contrast phase and implementation of an iterative reconstruction algorithm.
Collapse
Affiliation(s)
- Christos P Dimitroukas
- Department of Medical Physics, School of Medicine, University of Patras, Patras 265 04, Greece
- Department of Medical Physics, University Hospital of Patras, Patras 265 04, Greece
| | - Vasileios I Metaxas
- Department of Medical Physics, School of Medicine, University of Patras, Patras 265 04, Greece
| | - Fotios O Efthymiou
- Department of Medical Physics, School of Medicine, University of Patras, Patras 265 04, Greece
| | - Petros E Zampakis
- Department of Radiology, School of Medicine, University of Patras, Patras 265 04, Greece
- Department of Radiology, University Hospital of Patras, Patras 265 04, Greece
| | - Christina P Kalogeropoulou
- Department of Radiology, School of Medicine, University of Patras, Patras 265 04, Greece
- Department of Radiology, University Hospital of Patras, Patras 265 04, Greece
| | - George S Panayiotakis
- Department of Medical Physics, School of Medicine, University of Patras, Patras 265 04, Greece
- Department of Medical Physics, University Hospital of Patras, Patras 265 04, Greece
| |
Collapse
|
7
|
Zhang X, Wang T, Xiao X, Li X, Wang CY, Huang B, He L, Song Y. Radiotherapy for head and neck tumours using an oral fixation and parameter acquisition device and TOMO technology: a randomised controlled study. BMJ Open 2021; 11:e052542. [PMID: 34772753 PMCID: PMC8593711 DOI: 10.1136/bmjopen-2021-052542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 10/19/2021] [Indexed: 11/08/2022] Open
Abstract
INTRODUCTION Radiotherapy has become one of the main methods used for the treatment of malignant tumours of the head and neck. Spiral tomographic intensity-modulated radiotherapy has the many advantages of precision radiotherapy, which puts forward high requirements for postural reproducibility and accuracy. We will aim to ensure that the accurate positioning of the tumour will reduce the side effects of radiotherapy caused by positioning errors. We will design and implement this clinical trial using the patent of 'a radiotherapy oral fixation and parameter acquisition device (patent number: ZL201921877986.5)'. METHODS AND ANALYSIS This will be a randomised, controlled, prospective study with 120 patients with head and neck tumours. Using the random number table method, a random number sequence will be generated, and the patients will be enrolled in the experimental group (oral fixation device) and the control group (conventional fixation) in a 2:1 ratio. The primary outcome will be the progression-free survival time after the treatment. Secondary outcomes will include the oral mucosal reaction and the quality of life. Follow-ups will be carried out according to the plan. This is V.1.0 of protocol on 1 April 2021. The recruitment process for this clinical trial commenced on 1 May 2021, and will end on 1 October 2022. ETHICS AND DISSEMINATION The trial received ethical approval from Medical Ethics Committee of Liaoning Provincial Cancer Hospital (number 20210131X). The final results will be presented at a scientific conference and published in a peer-reviewed journal in accordance with the journal's guidelines. TRIAL REGISTRATION NUMBER ChiCTR2100045096.
Collapse
Affiliation(s)
- Xiaofang Zhang
- Department of Radiotherapy, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Tianlu Wang
- Department of Radiotherapy, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xinyan Xiao
- China Medical University, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xia Li
- Department of Radiotherapy, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Chen Yu Wang
- Department of Information Management, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Bo Huang
- Department of Pathology, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Lei He
- Department of Radiotherapy Physics, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yingqiu Song
- Department of Radiotherapy, Cancer Hospital of China Medical University, Shenyang, Liaoning, China
| |
Collapse
|
8
|
de Jong MC, Jamal K, Morley S, Beale T, Chung T, Jawad S, Hurel S, Simpson H, Srirangalingam U, Baldeweg SE, Rozalén García V, Otero S, Shawky M, Abdel-Aziz TE, Kurzawinski TR. The use of computed tomography as a first-line imaging modality in patients with primary hyperparathyroidism. Hormones (Athens) 2021; 20:499-506. [PMID: 32405929 DOI: 10.1007/s42000-020-00205-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 04/26/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND The success of minimally invasive parathyroidectomy (MIP) relies on accurate localization of the abnormal parathyroid glands. Concordant findings on ultrasound (US) and 99mTc-scintigraphy (sestamibi) are currently considered the 'gold standard'. Computed tomography (CT) has also recently been used in preoperative planning. We sought to assess the accuracy of CT for localization of abnormal parathyroid glands in such patients. METHODS An audit of 75 patients with primary hyperparathyroidism (PHPT) who underwent neck US and CT between 2017 and 2019 at our center as their first-line imaging. RESULTS All 75 patients underwent US and CT and 54 (72.0%) also had sestamibi. CT alone identified a potential target in all patients, of which the location was correct in 63 (84.0%). The overall combined sensitivity of US and CT was 88% (95% CI 78-94) and was higher than the combined sensitivity of US and sestamibi (65% [95% CI 53-76]; p < 0.001). Twenty-one patients (28.0%) had an ectopic gland, and the sensitivity of US and CT was 86% (95% CI 64-96) versus US and sestamibi (57% [95% CI 34-77]; p = 0.016). For adenomas < 1.0 g (n = 36; 48%), the accuracy of CT was 81% (95% CI 64-91) compared with 62% (95% CI 44-77) for US and sestamibi (p = 0.04). The correct preoperative diagnosis of multiglandular disease (n = 9; 12%) seemed to be the most difficult, with similar accuracy for US and sestamibi (40% [95% CI 14-73]) and US and CT (50% [95% CI 20-80]) (p > 0.99). CONCLUSION The combination of US and CT was able to correctly identify the location of the abnormal parathyroid in 88% of patients and, in comparison with US and sestamibi, had better diagnostic accuracy, especially for smaller and ectopic adenomas. This finding suggests that US and CT could be considered as a first-line imaging modality in patients with PHPT considered for MIP.
Collapse
Affiliation(s)
- Mechteld C de Jong
- Centre for Endocrine Surgery, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK.
| | - K Jamal
- Centre for Endocrine Surgery, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - S Morley
- Department of Radiology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - T Beale
- Department of Radiology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - T Chung
- Department of Endocrinology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - S Jawad
- Department of Radiology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - S Hurel
- Department of Endocrinology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - H Simpson
- Department of Endocrinology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - U Srirangalingam
- Department of Endocrinology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - S E Baldeweg
- Department of Endocrinology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - V Rozalén García
- Centre for Endocrine Surgery, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - S Otero
- Department of Radiology, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - M Shawky
- Centre for Endocrine Surgery, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - T E Abdel-Aziz
- Centre for Endocrine Surgery, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| | - T R Kurzawinski
- Centre for Endocrine Surgery, University College London Hospital, 235 Euston Road, London, NW1 2BU, UK
| |
Collapse
|
9
|
Oral A, Guvenis A. Improving the detectability of overactive glands in dual-phase parathyroid SPECT/CT: a Monte Carlo simulation study. Biomed Phys Eng Express 2021; 7. [PMID: 34102614 DOI: 10.1088/2057-1976/ac0954] [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: 01/25/2021] [Accepted: 06/08/2021] [Indexed: 11/11/2022]
Abstract
Objective. SPECT-CT is a standard procedure conducted before minimally invasive surgery for the treatment of primary hyperthyroidism. In order to improve image quality, it is important to know how defect detectability is influenced by acquisition and processing parameters. The objective of this study is to continue prior physical phantom optimization studies by performing Monte Carlo simulations for the dual phase parathyroid SPECT-CT protocol using a digital anthropomorphic phantom.Methods. The dual phase parathyroid SPECT-CT imaging procedure with 99mTc-Sestamibi was simulated using the previously extensively validated SIMIND software for the first time. An anthropomorphic ZUBAL based phantom was built to represent an adenoma. Its diameter was set to 0.76 cm which corresponded to more than three times the pixel size and the target-to-background ratio was set to 16:1 based on previous studies. Four different collimators were tested. Contrast-to-noise (CNR) values were determined for different scatter correction options and processing parameter values. The OSEM algorithm was used for image reconstruction.Results. CNR values were improved from about zero (LEGP collimator, 16 iterations, attenuation correction: on, scatter correction: off) up to 3.7 (LEUHR collimator, 16 iterations, attenuation correction: on, scatter correction: off). The subjective visual assessment of detectability on simulated images agreed with the quantitative CNR values.Conclusion. Higher resolution collimators gave better CNR as confirmed by similar studies. The effect of scatter correction was found beneficial only if both the resolution and sensitivity of the collimator were relatively high. This is a significant finding since there is a shortage of definitive guideline on the use of scatter correction for parathyroid SPECT imaging.
Collapse
Affiliation(s)
- Aysegul Oral
- Institute of Biomedical Engineering, Bogazici University, Kandilli Kampus, Cengelkoy, 34684 Istanbul, Turkey
| | - Albert Guvenis
- Institute of Biomedical Engineering, Bogazici University, Kandilli Kampus, Cengelkoy, 34684 Istanbul, Turkey
| |
Collapse
|
10
|
Leong D, Ng K, Boeddinghaus R, Lisewski D. Three-phase four-dimensional computed tomography as a first-line investigation in primary hyperparathyroidism. ANZ J Surg 2021; 91:1798-1803. [PMID: 33982332 DOI: 10.1111/ans.16924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 04/25/2021] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Parathyroid computed tomography using multiple phases (four-dimensional computed tomography (4DCT) for parathyroid localization was first described in 2006. Since its inception, there has been variable uptake of this technique due to inconsistency of results between institutions and perceived higher radiation dose than technetium-99 sestamibi scans (MIBI). 4DCT has been the primary imaging modality for parathyroid localization at our institution since 2013. METHODS A retrospective study of surgically managed patients with primary hyperparathyroidism who had preoperative localization with 4DCT from 2013-2018 was performed. RESULTS A total of 353 patients were included for analysis. The positive predictive value (PPV) of our three-phase 4DCT protocol was 93.3%, sensitivity (localized) 85.2% with a 5.8% false-positive rate and 13.9% false-negative (non-localizing) rate when reported by a head and neck radiologist (HNR). Calculated effective dose varied from 4.5 to 8.9mSV. On multivariable logistic regression, reporting by an experienced HNR (P < 0.001) and gland weight > 200 mg (P = 0.002) were significant for higher accuracy, lower false positives and false negatives. CONCLUSION A first-line three-phase 4DCT protocol for primary hyperparathyroidism is an accurate technique providing precise anatomical localization of abnormal parathyroid glands, particularly when performed by a specialist HNR. In our practise, it provides the best rate of detection and superior anatomical localization needed for minimally invasive parathyroid surgery, compared to other commonly used localization techniques. It also avoids the need for four gland exploration in the majority of patients with primary hyperparathyroidism.
Collapse
Affiliation(s)
- David Leong
- Endocrine Surgical Services, Sir Charles Gairdner Hospital, Western Australia, Australia
| | - Katrina Ng
- Endocrine Surgical Services, Sir Charles Gairdner Hospital, Western Australia, Australia
| | - Rudolf Boeddinghaus
- Department of Surgery, University of Western Australia, Nedlands, Western Australia, Australia.,Perth Radiological Clinic, Subiaco, Western Australia, Australia
| | - Dean Lisewski
- Department of Endocrine Surgery, Fiona Stanley Hospital, Murdoch, Western Australia, Australia
| |
Collapse
|
11
|
Shah R, Gosavi V, Mahajan A, Sonawane S, Hira P, Kurki V, Bal M, Sathe P, Pai P, D'Cruz A, Uchino S, Garale MN, Patil V, Lila A, Shah N, Bandgar T. Preoperative prediction of parathyroid carcinoma in an Asian Indian cohort. Head Neck 2021; 43:2069-2080. [PMID: 33751728 DOI: 10.1002/hed.26677] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/08/2021] [Accepted: 02/26/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Parathyroid carcinoma (PC) requires preoperative prediction for appropriate surgical management. Differentiation from symptomatic primary hyperparathyroidism (sPHPT) cohort is difficult. METHODS Patients with sPHPT from a tertiary-care center, Western India, including Cohort-A (n = 19 [10/M; 9/F]) with PC and Cohort-B (n = 93 [33/M; 60/F] with benign parathyroid lesions) were compared to derive predictors for differential diagnosis. RESULTS There were no differences in clinical or biochemical parameters between the two cohorts. Comparison of CECT parameters showed that irregular shape, tumor heterogeneity, infiltration, short/long-axis ratio >0.76, and long-diameter >30 mm had high negative-predictive value and intratumoral calcification had 100% positive-predictive value to diagnose PC; whereas there were no differences in contrast-enhancement patterns. Long diameter, short/long-axis ratio, and heterogeneity were significant predictors on multivariate analysis. CONCLUSION It is difficult to predict diagnosis of PC in an Indian sPHPT cohort based on clinical and biochemical parameters, whereas CECT parathyroid-based parameters can aid in diagnosis.
Collapse
Affiliation(s)
- Ravikumar Shah
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Vikrant Gosavi
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Abhishek Mahajan
- Department of Radiodiagnosis and Imaging, Tata Memorial Center, Mumbai, India
| | - Sushil Sonawane
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Priya Hira
- Department of Radiology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Vineeth Kurki
- Department of Radiodiagnosis and Imaging, Tata Memorial Center, Mumbai, India
| | - Munita Bal
- Department of Pathology, Tata Memorial Center, Mumbai, India
| | - Pragati Sathe
- Department of Pathology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Prathamesh Pai
- Department of Head & Neck Surgical Oncology, Tata Memorial Center, Mumbai, India
| | - Anil D'Cruz
- Department of Head & Neck Surgical Oncology, Apollo Hospital, Navi Mumbai, India
| | - Shinya Uchino
- Noguchi Thyroid Clinic and Hospital Foundation, Beppu, Oita, Japan
| | - Mahadeo Namdeo Garale
- Department of General Surgery, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Virendra Patil
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Anurag Lila
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Nalini Shah
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Tushar Bandgar
- Department of Endocrinology, Seth GS Medical College & KEM Hospital, Mumbai, India
| |
Collapse
|
12
|
Bebbington NA, Haddock BT, Bertilsson H, Hippeläinen E, Husby EM, Tunninen VI, Söderberg M. A Nordic survey of CT doses in hybrid PET/CT and SPECT/CT examinations. EJNMMI Phys 2019; 6:24. [PMID: 31845047 PMCID: PMC6915162 DOI: 10.1186/s40658-019-0266-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/28/2019] [Indexed: 11/30/2022] Open
Abstract
Background Computed tomography (CT) scans are routinely performed in positron emission tomography (PET) and single photon emission computed tomography (SPECT) examinations globally, yet few surveys have been conducted to gather national diagnostic reference level (NDRL) data for CT radiation doses in positron emission tomography/computed tomography (PET/CT) and single photon emission computed tomography/computed tomography (SPECT/CT). In this first Nordic-wide study of CT doses in hybrid imaging, Nordic NDRL CT doses are suggested for PET/CT and SPECT/CT examinations specific to the clinical purpose of CT, and the scope for optimisation is evaluated. Data on hybrid imaging CT exposures and clinical purpose of CT were gathered for 5 PET/CT and 8 SPECT/CT examinations via designed booklet. For each included dataset for a given facility and scanner type, the computed tomography dose index by volume (CTDIvol) and dose length product (DLP) was interpolated for a 75-kg person (referred to as CTDIvol,75kg and DLP75kg). Suggested NDRL (75th percentile) and achievable doses (50th percentile) were determined for CTDIvol,75kg and DLP75kg according to clinical purpose of CT. Differences in maximum and minimum doses (derived for a 75-kg patient) between facilities were also calculated for each examination and clinical purpose. Results Data were processed from 83 scanners from 43 facilities. Data were sufficient to suggest Nordic NDRL CT doses for the following: PET/CT oncology (localisation/characterisation, 15 systems); infection/inflammation (localisation/characterisation, 13 systems); brain (attenuation correction (AC) only, 11 systems); cardiac PET/CT and SPECT/CT (AC only, 30 systems); SPECT/CT lung (localisation/characterisation, 12 systems); bone (localisation/characterisation, 30 systems); and parathyroid (localisation/characterisation, 13 systems). Great variations in dose were seen for all aforementioned examinations. Greatest differences in DLP75kg for each examination, specific to clinical purpose, were as follows: SPECT/CT lung AC only (27.4); PET/CT and SPECT/CT cardiac AC only (19.6); infection/inflammation AC only (18.1); PET/CT brain localisation/characterisation (16.8); SPECT/CT bone localisation/characterisation (10.0); PET/CT oncology AC only (9.0); and SPECT/CT parathyroid localisation/characterisation (7.8). Conclusions Suggested Nordic NDRL CT doses are presented according to clinical purpose of CT for PET/CT oncology, infection/inflammation, brain, PET/CT and SPECT/CT cardiac, and SPECT/CT lung, bone, and parathyroid. The large variation in doses suggests great scope for optimisation in all 8 examinations.
Collapse
Affiliation(s)
| | - Bryan T Haddock
- Department of Clinical Physiology, Nuclear Medicine and PET, Rigshospitalet, Copenhagen University Hospital, Ndr. Ringvej 57, 2600, Glostrup, Denmark
| | | | - Eero Hippeläinen
- HUS Medical Imaging Center, Clinical Physiology and Nuclear Medicine, Nuclear Medicine Unit, Meilahti Hospital, University of Helsinki and Helsinki University Hospital, Tukholmankatu 8 F, PL 442, 00029 HUS, Helsinki, Finland
| | - Ellen M Husby
- Department of Diagnostic Physics, Gaustad Hospital, Oslo University Hospital, Building 20, P.O. Box 4959, N-0424, Nydalen, Oslo, Norway
| | - Virpi I Tunninen
- Department of Nuclear Medicine, Satakunta Central Hospital, Sairaalantie 3, 28500, Pori, Finland
| | - Marcus Söderberg
- Medical Radiation Physics, Department of Translational Medicine, Lund university, Inga Marie Nilssons gata 49, 20502, Malmö, Sweden.,Radiation Physics, Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Inga Marie Nilssons gata 49, 20502, Malmö, Sweden
| |
Collapse
|
13
|
Practice Patterns in Parathyroid Surgery: A Survey of Asia-Pacific Parathyroid Surgeons. World J Surg 2019; 43:1964-1971. [PMID: 30941454 DOI: 10.1007/s00268-019-04990-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Practice variations exist amongst parathyroid surgeons depending on their expertise and resources. Our study aims to elucidate the choice of surgical techniques and adjuncts used in parathyroid surgery by surgeons in the Asia-Pacific region. METHODS A 25-question online survey was sent to members of five endocrine surgery associations. Questions covered training background, practice environment and preferred techniques in parathyroid surgery. Respondents were divided into three regions: Australia/New Zealand, South/South East Asia and East Asia, and responses were analysed according to region, specialty, case volume and years in practice. RESULTS One hundred ninety-six surgeons returned the questionnaire. Most surgeons (98%) routinely perform preoperative imaging, with 75% preferring dual imaging with 99mTcsestamibi and ultrasound. Ten per cent of surgeons use parathyroid 4DCT as first-line imaging, more commonly in East Asia (p = 0.038). Minimally invasive parathyroidectomy is the favoured technique of choice (97%). Most surgeons reporting robotic or endoscopic approaches are from East Asia. Rapid intraoperative parathyroid hormone is accessible to just under half of the surgeons but less available in Australian/New Zealand (p < 0.001). The use of intraoperative neuromonitoring is not commonly used, even less so amongst Asian surgeons (p = 0.048) and surgeons with low case load (p = 0.013). CONCLUSION Dual localisation techniques are the preferred choice of investigations in preparation for parathyroid surgery, with minimally invasive surgery without neuromonitoring the preferred approach. Use of adjuncts is sporadic and limited to certain centres.
Collapse
|