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Maronnier Q, Robaine N, Chaltiel L, Dierickx LO, Cassou-Mounat T, Terroir M, Vija L, Vallot D, Brillouet S, Lamesa C, Filleron T, Caselles O, Courbon F. Insertion of synthetic lesions on patient data: a method for evaluating clinical performance differences between PET systems. EJNMMI Phys 2024; 11:9. [PMID: 38252388 PMCID: PMC10803700 DOI: 10.1186/s40658-023-00610-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/11/2023] [Accepted: 12/20/2023] [Indexed: 01/23/2024] Open
Abstract
BACKGROUND Performance assessment of positron emission tomography (PET) scanners is crucial to guide clinical practice with efficiency. We have already introduced and experimentally evaluated a simulation method allowing the creation of a controlled ground truth for system performance assessment. In the current study, the goal was to validate the method using patient data and demonstrate its relevance to assess PET performances accuracy in clinical conditions. METHODS Twenty-four patients were recruited and sorted into two groups according to their body mass index (BMI). They were administered with a single dose of 2 MBq/kg 18F-FDG and scanned using clinical protocols consecutively on two PET systems: the Discovery-IQ (DIQ) and the Discovery-MI (DMI). For each BMI group, sixty synthetic lesions were dispatched in three subgroups and inserted at relevant anatomical locations. Insertion of synthetic lesions (ISL) was performed at the same location into the two consecutive exams. Two nuclear medicine physicians evaluated individually and blindly the images by qualitatively and semi-quantitatively reporting each detected lesion and agreed on a consensus. We assessed the inter-system detection rates of synthetic lesions and compared it to an initial estimate of at least 1.7 more targets detected on the DMI and the detection rates of natural lesions. We determined the inter-reader variability, evaluated according to the inter-observer agreement (IOA). Adequate inter-reader variability was found for IOA above 80%. Differences in standardized uptake value (SUV) metrics were also studied. RESULTS In the BMI ≤ 25 group, the relative true positive rate (RTPR) for synthetic and natural lesions was 1.79 and 1.83, respectively. In the BMI > 25 group, the RTPR for synthetic and natural lesions was 2.03 and 2.27, respectively. For each BMI group, the detection rate using ISL was consistent to our estimate and with the detection rate measured on natural lesions. IOA above 80% was verified for any scenario. SUV metrics showed a good agreement between synthetic and natural lesions. CONCLUSIONS ISL proved relevant to evaluate performance differences between PET scanners. Using these synthetically modified clinical images, we can produce a controlled ground truth in a realistic anatomical model and exploit the potential of PET scanner for clinical purposes.
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Affiliation(s)
- Quentin Maronnier
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France.
| | - Nesrine Robaine
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Léonor Chaltiel
- Biostatistics Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Lawrence O Dierickx
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Thibaut Cassou-Mounat
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Marie Terroir
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Lavinia Vija
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Delphine Vallot
- Medical Physics Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Séverine Brillouet
- Radiopharmacy Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Chloé Lamesa
- Radiopharmacy Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Thomas Filleron
- Biostatistics Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Olivier Caselles
- Medical Physics Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
| | - Frédéric Courbon
- Nuclear Medicine Department, Institut Claudius Regaud, Institut Universitaire du Cancer Toulouse Oncopole, Toulouse, France
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Poumeaud F, Duval M, Gambart M, O Dierickx L, Abbo O, Hangard G, Doyen J, Vidal M, Aubert S, Carillo F, Mouly C, Vial J, Gomez-Brouchet A, Laprie A. High-risk abdominal pediatric paraganglioma. Pediatr Blood Cancer 2023; 70:e29834. [PMID: 35731232 DOI: 10.1002/pbc.29834] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/21/2022] [Accepted: 05/24/2022] [Indexed: 12/25/2022]
Affiliation(s)
- François Poumeaud
- Department of Radiation Oncology, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
| | - Mathilde Duval
- Department of Radiation Oncology, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
| | - Marion Gambart
- Department of Pediatric Oncology, Hopital des enfants, CHU de Toulouse, Toulouse, France
| | - Lawrence O Dierickx
- Department of Nuclear Medicine, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
| | - Olivier Abbo
- Department of Pediatric Oncology, Hopital des enfants, CHU de Toulouse, Toulouse, France
| | - Grégory Hangard
- Department of Radiation Oncology, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
| | - Jérôme Doyen
- Institut Méditerranéen de Protonthérapie, Centre Antoine Lacassagne, Nice, France
| | - Marie Vidal
- Institut Méditerranéen de Protonthérapie, Centre Antoine Lacassagne, Nice, France
| | - Sebastien Aubert
- Department of Anatomical Pathology, Centre Hospitalier Universitaire de Lille, Lille, France
| | - Fabienne Carillo
- Department of Radiation Oncology, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
| | - Céline Mouly
- Department of Radiation Oncology, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
| | - Julie Vial
- Department of Pediatric Oncology, Hopital des enfants, CHU de Toulouse, Toulouse, France
| | - Anne Gomez-Brouchet
- Department of Anatomical Pathology, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Anne Laprie
- Department of Radiation Oncology, Institut Universitaire du Cancer de Toulouse-Oncopole, Toulouse, France
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Partouche E, Yeh R, Eche T, Rozenblum L, Carrere N, Guimbaud R, Dierickx LO, Rousseau H, Dercle L, Mokrane FZ. Updated Trends in Imaging Practices for Pancreatic Neuroendocrine Tumors (PNETs): A Systematic Review and Meta-Analysis to Pave the Way for Standardization in the New Era of Big Data and Artificial Intelligence. Front Oncol 2021; 11:628408. [PMID: 34336643 PMCID: PMC8316992 DOI: 10.3389/fonc.2021.628408] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 06/25/2021] [Indexed: 01/03/2023] Open
Abstract
Purpose Medical imaging plays a central and decisive role in guiding the management of patients with pancreatic neuroendocrine tumors (PNETs). Our aim was to synthesize all recent literature of PNETs, enabling a comparison of all imaging practices. Methods based on a systematic review and meta-analysis approach, we collected; using MEDLINE, EMBASE, and Cochrane Library databases; all recent imaging-based studies, published from December 2014 to December 2019. Study quality assessment was performed by QUADAS-2 and MINORS tools. Results 161 studies consisting of 19852 patients were included. There were 63 ‘imaging’ studies evaluating the accuracy of medical imaging, and 98 ‘clinical’ studies using medical imaging as a tool for response assessment. A wide heterogeneity of practices was demonstrated: imaging modalities were: CT (57.1%, n=92), MR (42.9%, n=69), PET/CT (13.3%, n=31), and SPECT/CT (9.3%, n=15). International imaging guidelines were mentioned in 2.5% (n=4/161) of studies. In clinical studies, imaging protocol was not mentioned in 30.6% (n=30/98) of cases and only mentioned imaging modality without further information in 63.3% (n=62/98), as compared to imaging studies (1.6% (n=1/63) of (p<0.001)). QUADAS-2 and MINORS tools deciphered existing biases in the current literature. Conclusion We provide an overview of the updated current trends in use of medical imaging for diagnosis and response assessment in PNETs. The most commonly used imaging modalities are anatomical (CT and MRI), followed by PET/CT and SPECT/CT. Therefore, standardization and homogenization of PNETs imaging practices is needed to aggregate data and leverage a big data approach for Artificial Intelligence purposes.
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Affiliation(s)
- Ephraïm Partouche
- Radiology Department, Rangueil University Hospital, Toulouse, France
| | - Randy Yeh
- Memorial Sloan Kettering Cancer Center, Molecular Imaging and Therapy Service., New York, NY, United States
| | - Thomas Eche
- Radiology Department, Rangueil University Hospital, Toulouse, France
| | - Laura Rozenblum
- Sorbonne Université, Service de Médecine Nucléaire, AP-HP, Hôpital La Pitié-Salpêtrière, Paris, France
| | - Nicolas Carrere
- Surgery Department, Toulouse University Hospital, Toulouse, France
| | - Rosine Guimbaud
- Oncology Department, Toulouse University Hospital, Toulouse, France
| | | | - Hervé Rousseau
- Radiology Department, Rangueil University Hospital, Toulouse, France
| | - Laurent Dercle
- Department of Radiology, New York Presbyterian Hospital, Columbia University Vagellos College of Physicians and Surgeons, New York, NY, United States
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Gallo F, Vija L, Le Grand S, Moukarbel N, Mortele K, Gabiache E, Courbon F, Tavitian S, Dierickx LO. Diagnosis of an intestinal mucormycosis 'fungus ball' located with PET/CT with [ 18F] FDG-PET/CT. Eur J Hybrid Imaging 2019; 3:21. [PMID: 34191164 PMCID: PMC8218064 DOI: 10.1186/s41824-019-0068-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/14/2019] [Indexed: 11/24/2022] Open
Abstract
Mucormycosis is a life-threatening infection with most commonly rhino-orbital-cerebral and pulmonary syndromes that mostly occurs in immunocompromised patients. FDG-PET/CT emerged as a sensitive non-invasive tool to identify systemic mucormycosis. We present a 59-year-old woman for whom a PET/CT with 18F-FDG was performed in search of a primary location of mucormycosis with non-contributive conventional workup. A large left abdominal mass was seen, compatible with a fungus ball, with intense parietal uptake and without any central uptake. The localization of the infection provided a target for surgery and permitted to adapt the therapeutic strategy. After resection, the final diagnosis was consistent with mucormycosis. To our knowledge, this is the first report of a PET/CT image with FDG showing an intestinal fungus ball. PET/CT with 18F-FDG may contribute to the management of patients with fungal infections of unknown origin.
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Affiliation(s)
- Franklin Gallo
- Department of Radiology, Institut Claudius Regaud, Institut Universitaire de Cancer de Toulouse-Oncopole, 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Lavinia Vija
- Department of Nuclear Medicine, Institut Claudius Regaud (ICR), Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Sophie Le Grand
- Department of Haematology, Centre Hospitalo-universitaire (CHU) de Toulouse, Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Nada Moukarbel
- Department of Pathology, Centre Hospitalo-universitaire (CHU) de Toulouse, Institut Universitaire du Cancer de Toulouse-Oncopole, 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Koen Mortele
- Department of Radiology, Beth Israel Deaconess Medical Center (BIDMC), 330 Brookline Ave, Boston, MA, 02215, USA
| | - Erwan Gabiache
- Department of Nuclear Medicine, Institut Claudius Regaud (ICR), Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Frédéric Courbon
- Department of Nuclear Medicine, Institut Claudius Regaud (ICR), Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Suzanne Tavitian
- Department of Haematology, Centre Hospitalo-universitaire (CHU) de Toulouse, Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), 1, av Irène Joliot-Curie, 31059, Toulouse, France
| | - Lawrence O Dierickx
- Department of Nuclear Medicine, Institut Claudius Regaud (ICR), Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), 1, av Irène Joliot-Curie, 31059, Toulouse, France.
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Dierickx LO, Dercle L, Chaltiel L, Caselles O, Brillouet S, Zerdoud S, Courbon F. Evaluation of 2 diuretic 18fluorine-fluorodeoxyglucose positron emission tomography/computed tomography imaging protocols for intrapelvic cancer. Q J Nucl Med Mol Imaging 2017; 63:284-291. [PMID: 28358186 DOI: 10.23736/s1824-4785.17.02912-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND 18F-Fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) plays an important part in the oncological evaluation of the abdomen and pelvis, but the interpretation and quantification is often hampered by intense physiological urinary activity. We evaluate 2 different diuretic imaging protocols by comparing intensity of urinary activity and we look at the impact of multiple variables on the final urinary activity. METHODS Comparative analysis of 102 patients (median age: 64) having intrapelvic carcinoma. After full body acquisition, 58 patients were administered 20 mg of furosemide 90 min post injection of FDG (P90). For 44 patients, 20 mg of furosemide was administered 30 min post injection of FDG (P30). Comparisons between groups were performed using the Mann-Whitney Test and χ2. The BMI, creatinine, clearance, age, injected activity, diuretic protocol, gender and glycemia were evaluated with multivariate analysis for their impact on the final urinary activity. RESULTS Concerning the comparison of the urinary activity we observe a significant difference (P=0.0029) between P90 and P30 for the SUVmax (median 4.3 [range 1.6: 17.7] vs. 6.0 [range 2.9: 15.1]), and for the SUVmean (P<0.001) (median 2.4 [range 1.1; 9.9] vs. 3.8 [range 2.0; 10.1]). For 2 patients of P30, the acquisition was interrupted because the patient needed to void. Multivariate analysis shows that creatinine and creatinine clearance do not have a significant independent impact on the final bladder activity. CONCLUSIONS By comparing the 2 diuretic imaging protocols, we found a significant lower urinary activity for the P90 protocol and the regression decision tree shows that the P90 protocol is mostly superior. The P30 protocol, which seems to be less well tolerated, is adequate in the group of patients with an injected activity of less than 240 MBq and older than 65 years, if P90 is not feasible. For most patients with injected activity ≥240 MBq or BMI of ≥25 and a glycemia >120 mg/dL, a significant amount of residual urinary activity remains for both protocols.
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Affiliation(s)
- Lawrence O Dierickx
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France - .,Laboratoire de Recherche LU50 SIMAD, Paul Sabatier Toulouse III University, Toulouse, France -
| | - Laurent Dercle
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France
| | - Leonor Chaltiel
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France
| | - Olivier Caselles
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France.,Laboratoire de Recherche LU50 SIMAD, Paul Sabatier Toulouse III University, Toulouse, France
| | - Séverine Brillouet
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France
| | - Slimane Zerdoud
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France
| | - Frédéric Courbon
- Department of Nuclear Medicine, Institut Universitaire Cancer Toulouse Oncopole, Toulouse, France
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Aziz AL, Courbon F, Dierickx LO, Pascal P, Zerdoud S. Oncocytic Adenoma of Thyroid Incidentally Detected by 18F-Fluorocholine PET/CT. J Nucl Med Technol 2015; 43:133-4. [PMID: 25857420 DOI: 10.2967/jnmt.114.145433] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 07/09/2014] [Accepted: 10/15/2014] [Indexed: 11/16/2022] Open
Abstract
A 58-old-man underwent (18)F-fluorocholine PET/CT for restaging of prostate cancer because of a rising level of prostate-specific antigen.( 18)F-fluorocholine showed no significant tracer uptake at the site of the prostatectomy or the pelvic lymph nodes. Incidental high tracer uptake was observed in a 26 × 23 mm left thyroid nodule. A benign tumor of the thyroid (oncocytic adenoma of thyroid) was diagnosed after left loboisthmectomy.
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Didierlaurent D, Jaudet C, Ribes S, Batatia H, Dierickx LO, Zerdoud S, Brillouet S, Weyts K, Courbon F, Caselles O. Comparison of an alternative and existing binning methods to reduce the acquisition duration of 4D PET/CT. Med Phys 2014; 41:112503. [DOI: 10.1118/1.4897612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Didierlaurent D, Ribes S, Batatia H, Jaudet C, Dierickx LO, Zerdoud S, Brillouet S, Caselles O, Courbon F. The retrospective binning method improves the consistency of phase binning in respiratory-gated PET/CT. Phys Med Biol 2012; 57:7829-41. [PMID: 23135238 DOI: 10.1088/0031-9155/57/23/7829] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This study assesses the accuracy of prospective phase-gated PET/CT data binning and presents a retrospective data binning method that improves image quality and consistency. Respiratory signals from 17 patients who underwent 4D PET/CT were analysed to evaluate the reproducibility of temporal triggers used for the standard phase-based gating method. Breathing signals were reprocessed to implement retrospective PET data binning. The mean and standard deviation of time lags between automatic triggers provided by the Real-time Position Management (RPM, Varian) gating device and inhalation peaks derived from respiratory curves were computed for each patient. The total number of respiratory cycles available for 4D PET/CT according to the binning mode (prospective versus retrospective) was compared. The maximum standardized uptake value (SUV(max)), biological tumour volume (BTV) and tumour trajectory measures were determined from the PET/CT images of five patients. Compared to retrospective binning (RB), prospective gating approach led to (i) a significant loss in breathing cycles (15%) and (ii) the inconsistency of data binning due to temporal dispersion of triggers (average 396 ms). Consequently, tumour characterization could be impacted. In retrospective mode, SUV(max) was up to 27% higher, where no significant difference appeared in BTV. In addition, prospective mode gave an inconsistent spatial location of the tumour throughout the bins. Improved consistency with breathing patterns and greater motion amplitude of the tumour centroid were observed with retrospective mode. The detection of the tumour motion and trajectory was improved also for small temporal dispersion of triggers. This study shows that the binning mode could have a significant impact on 4D PET images. The consistency of triggers with breathing signals should be checked before clinical use of gated PET/CT images, and our RB method improves 4D PET/CT image quantification.
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Affiliation(s)
- D Didierlaurent
- SIMAD, LU 50, Université Paul Sabatier Toulouse III, Toulouse, France.
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Dierickx LO, Everaert H, Deron P, Voordeckers M, Lahoutte T, Bossuyt A. Evaluation of the response to therapy of head and neck squamous cell carcinoma by using 3-[123I]iodo-L-alpha-methyl tyrosine and single photon emission tomography. Nucl Med Commun 2003; 24:633-41. [PMID: 12766598 DOI: 10.1097/00006231-200306000-00004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Early detection of residual tumour tissue offers the possibility for rapid administration of adjuvant treatment. Single photon emission tomography (SPET) with 3-[123I]iodo-L-alpha-methyl tyrosine (IMT) offers the ability to detect recurrence. The aim of this study was to carry out a prospective evaluation of sequential IMT SPET before and after primary therapy and to determine the best timing for scanning in order to establish the response to treatment. Sixteen consecutive patients with histologically proven head and neck cancer (HNC), who underwent IMT SPET before therapy, within 1 week of therapy, and 1 and 3 months after completion of primary therapy were included. Images were classified, according to clinical evaluation, as indicating a high likelihood (HL), intermediate likelihood (IL) and low likelihood (LL) that residual tumoural tissue was present. The definitive clinicopathological diagnosis and follow-up was considered as the 'gold standard'. Based on the definitive clinicopathological outcome, 10 of 16 patients were diagnosed with evidence of local tumour and six without. Nine of 10 patients with evidence of local tumour presented with an HL IMT SPET image after 3 months, seven of whom were from within the first week. In this group, 1/10 patients was considered clinically HS the first week and eventually 4/10 patients became HL, of which there were three at 3 months. Of the six patients diagnosed without local evidence of tumour, with an average follow-up of 15 months, 6/6 were clinically LL in the first week. Three of six had a consistently LL IMT SPET from within the first week. The three other patients had an HL scan the first week, of which one became IL. It is concluded that IMT SPET assessed the response to primary therapy most accurately 3 months after completion of therapy. An IMT SPET image that indicates a high likelihood of residual tumoural tissue may allow earlier stratification of the patients for secondary treatment. If negative, an IMT SPET can exclude residual tumoural tissue from within the first week after completion of therapy.
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Affiliation(s)
- L O Dierickx
- Department of Nuclear Medicine, Academisch Ziekenhuis Vrije Universiteit Brussel, Brussels, Belgium.
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Dierickx LO, Lahoutte T, Deron P, Caveliers V, Vanhove C, Everaert H, Bossuyt A. Diagnosis of recurrent head and neck squamous cell carcinoma with 3-[123I]iodo-L-alpha-methyltyrosine SPET. Eur J Nucl Med 2001; 28:282-7. [PMID: 11315594 DOI: 10.1007/s002590000439] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The distribution of 3-[123I]iodo-L-alpha-methyltyrosine (123I-3-IMT) in the tumour region of 21 patients with clinically suspected recurrent squamous cell head and neck carcinoma was studied. Single-photon emission tomography (SPET) imaging of the head and neck region was performed 10 min after the injection of 130-170 MBq 123I-3-IMT using a dual-detector gamma camera. Images were interpreted visually and classified as positive or negative for recurrent disease. In addition, target to background ratios (T/B) were measured using semi-automated region of interest analysis. IMT-SPET results were compared with the data derived from clinicopathological follow-up. IMT-SPET detected recurrent disease in 14 of 15 patients (sensitivity 93%). T/B ratios ranged between 1.5 and 2.4 (mean 1.88). One patient with a small tumour (1.2 cm) had a false-negative result. This is attributed to the limited spatial resolution of the SPET system. Five of six patients were correctly diagnosed to be negative for tumour recurrence. T/B ratios ranged between 1.2 and 1.4 (mean 1.30). In one patient IMT-SPET was positive without evidence of recurrence based on clinicopathological follow up. This finding was probably due to uptake into inflammatory tissue. IMT-SPET appears to be a sensitive tool (93%) for the detection of recurrent head and neck squamous cell carcinoma. Further studies with 123I-3-IMT as a metabolic tracer for the detection of head and neck cancer recurrence using SPET are recommended.
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Affiliation(s)
- L O Dierickx
- Department of Nuclear Medicine, Academisch Ziekenhuis Vrije Universiteit Brussel, Laarbeeklaan 101, 1090 Jette, Brussels, Belgium.
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Caveliers V, Everaert H, Lahoutte T, Dierickx LO, John CS, Bossuyt A. Labelled sigma receptor ligands: can their role in neurology and oncology be extended? Eur J Nucl Med 2001; 28:133-5. [PMID: 11303881 DOI: 10.1007/s002590000368] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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