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Jankowski PP, Chan JP. Advances in Imaging (Intraop Cone-Beam Computed Tomography, Synthetic Computed Tomography, Bone Scan, Low-Dose Protocols). Neurosurg Clin N Am 2024; 35:161-172. [PMID: 38423732 DOI: 10.1016/j.nec.2023.11.007] [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] [Indexed: 03/02/2024]
Abstract
Spine surgery has seen a rapid advance in the refinement and development of 3-dimensional and nuclear imaging modalities in recent years. Cone-beam CT has proven to be a valuable tool for improving the accuracy of pedicle screw placement. The use of synthetic CT and low-dose CT have also emerged as modalities which allow for little to no radiation while streamlining imaging workflows. Bone scans also serve to provide functional information about bone metabolism in both the preoperative and postoperative monitoring phases.
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Affiliation(s)
- Pawel P Jankowski
- Hoag Spine Center, 520 Superior Avenue, #300, Newport Beach, CA 92663, USA.
| | - Justin P Chan
- University of California, Irvine, 101 The City Drive South, Orange, CA 92868, USA
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Ahmad MI, Liu L, Sheikh A, Nicolaou S. Dual-energy CT: Impact of detecting bone marrow oedema in occult trauma in the Emergency. BJR Open 2024; 6:tzae025. [PMID: 39345237 PMCID: PMC11427222 DOI: 10.1093/bjro/tzae025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 08/14/2024] [Accepted: 08/30/2024] [Indexed: 10/01/2024] Open
Abstract
Dual-energy computed tomography (DECT) is an advanced imaging technique that acquires data using two distinct X-ray energy spectra, typically at 80 and 140 kVp, to differentiate materials based on their atomic number and electron density. This capability allows for the enhanced visualisation of various pathologies, including bone marrow oedema (BMO), by providing high-resolution images with notable energy spectral separation while maintaining radiation doses comparable to conventional CT. DECT's ability to create colour-coded virtual non-calcium (VNCa) images has proven particularly valuable in detecting traumatic bone marrow lesions (BMLs) and subtle fractures, offering a reliable alternative or complement to MRI. DECT has emerged as a significant tool in the detection and characterisation of bone marrow pathologies, especially in traumatic injuries. Its ability to generate high-resolution images and distinguish between different tissue types makes it a valuable asset in clinical diagnostics. With its comparable diagnostic accuracy to MRI and the added advantage of reduced examination time and increased availability, DECT represents a promising advancement in the imaging of BMO and related conditions.
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Affiliation(s)
| | - Lulu Liu
- Department of Radiology, Univeristy of British Columbia, Vancouver, Canada
| | - Adnan Sheikh
- Department of Radiology, Univeristy of British Columbia, Vancouver, Canada
| | - Savvas Nicolaou
- Department of Radiology, Univeristy of British Columbia, Vancouver, Canada
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Mennen AHM, Blokland AS, Maas M, van Embden D. Imaging of pelvic ring fractures in older adults and its clinical implications-a systematic review. Osteoporos Int 2023; 34:1549-1559. [PMID: 37286662 PMCID: PMC10427539 DOI: 10.1007/s00198-023-06812-9] [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: 03/14/2023] [Accepted: 05/26/2023] [Indexed: 06/09/2023]
Abstract
Identifying the full scope of pelvic fracture patterns in older adults has gained clinical importance since the last decennium. CT is recommended as the golden standard; however, MRI has even greater diagnostic accuracy. Dual energy computed tomography (DECT) is a new and promising imaging technique, but the diagnostic accuracy in the context of pelvic fragility fractures (FFPs) has not been widely established. The aim was to provide insight into the diagnostic accuracy of different imaging techniques and the relevance for clinical practice. A systematic search was performed in the PubMed database. All studies that reported on CT, MRI or DECT imaging techniques in older adults who suffered a pelvic fracture were reviewed and, if relevant, included. Eight articles were included. In up to 54% of the patients, additional fractures were found on MRI compared to CT, and in up to 57% of the patients on DECT. The sensitivity of DECT for posterior pelvic fracture detection was similar to MRI. All patients without fractures on CT appeared to have posterior fractures on MRI. After additional MRI, 40% of the patients had a change of classification. DECT and MRI showed very similar results in terms of diagnostic accuracy. Over a third of all patients appear to have a more severe fracture classification after MRI, the majority changing to Rommens type 4. However, in only a few patients who changed of fracture classification, a change of therapy was advised. This review suggests that MRI and DECT scans are superior in diagnosing FFPs.
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Affiliation(s)
- Anna H M Mennen
- Department of Surgery, Amsterdam UMC Location University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands.
- Amsterdam Movement Sciences, Amsterdam, The Netherlands.
| | - Alida S Blokland
- Department of Surgery, Amsterdam UMC Location University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Mario Maas
- Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Department of Radiology & Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
| | - Daphne van Embden
- Department of Surgery, Amsterdam UMC Location University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands
- Amsterdam Movement Sciences, Amsterdam, The Netherlands
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Hussain O, Kaushal M, Agarwal N, Kurpad S, Shabani S. The Role of Magnetic Resonance Imaging and Computed Tomography in Spinal Cord Injury. Life (Basel) 2023; 13:1680. [PMID: 37629537 PMCID: PMC10455833 DOI: 10.3390/life13081680] [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: 06/08/2023] [Revised: 07/26/2023] [Accepted: 08/02/2023] [Indexed: 08/27/2023] Open
Abstract
Traumatic injuries of the spine are associated with long-term morbidity and mortality. Timely diagnosis and appropriate management of mechanical instability and spinal cord injury are important to prevent further neurologic deterioration. Spine surgeons require an understanding of the essential imaging techniques concerning the diagnosis, management, and prognosis of spinal cord injury. We present a review in the role of computed tomography (CT) including advancements in multidetector CT (MDCT), dual energy CT (DECT), and photon counting CT, and how it relates to spinal trauma. We also review magnetic resonance imaging (MRI) and some of the developed MRI based classifications for prognosticating the severity and outcome of spinal cord injury, such as diffusion weighted imaging (DWI), diffusion tractography (DTI), functional MRI (fMRI), and perfusion MRI.
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Affiliation(s)
- Omar Hussain
- Department of Neurological Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (O.H.); (M.K.); (S.K.)
| | - Mayank Kaushal
- Department of Neurological Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (O.H.); (M.K.); (S.K.)
| | - Nitin Agarwal
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA;
| | - Shekar Kurpad
- Department of Neurological Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (O.H.); (M.K.); (S.K.)
| | - Saman Shabani
- Department of Neurological Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA; (O.H.); (M.K.); (S.K.)
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Abstract
An expanding array of image-guided spine interventions have the potential to provide immediate and effective pain relief. Innovations in spine intervention have proceeded rapidly, with clinical adoption of new techniques at times occurring before the development of bodies of evidence to establish efficacy. Although new spine interventions have been evaluated by clinical trials, acceptance of results has been hindered by controversies regarding trial methodology. This article explores controversial aspects of four categories of image-guided interventions for painful conditions: spine interventions for postdural puncture headache resulting from prior lumbar procedures, epidural steroid injections for cervical and lumbar radiculopathy, interventions for facet and sacroiliac joint pain, and vertebral augmentations for compression fractures. For each intervention, we summarize the available literature, with an emphasis on persistent controversies, and discuss how current areas of disagreement and challenge may shape future research and innovation. Despite the ongoing areas of debate regarding various aspects of these procedures, effective treatments continue to emerge and show promise for aiding relief of a range of debilitating conditions.
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Marques ML, da Silva NP, van der Heijde D, Reijnierse M, Baraliakos X, Braun J, van Gaalen F, Ramiro S. Hounsfield Units measured in low dose CT reliably assess vertebral trabecular bone density changes over two years in axial spondyloarthritis. Semin Arthritis Rheum 2023; 58:152144. [PMID: 36521287 DOI: 10.1016/j.semarthrit.2022.152144] [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: 09/13/2022] [Revised: 11/18/2022] [Accepted: 11/29/2022] [Indexed: 12/02/2022]
Abstract
OBJECTIVES To describe low dose Computed Tomography (ldCT) Hounsfield Units (HU) two-year change-from-baseline values (expressing trabecular bone density changes) and analyse their inter-reader reliability per vertebra in radiographic axial spondyloarthritis (r-axSpA). METHODS We used 49 patients with r-axSpA from the multicentre two-year Sensitive Imaging in Ankylosing Spondylitis (SIAS) study. LdCT HU were independently measured by two trained readers at baseline and two years. Mean (standard deviation, SD) for the change-from-baseline HU values were provided per vertebra by reader. Intraclass correlation coefficients (ICC; absolute agreement, two-way random effect), Bland-Altman plots and smallest detectable change (SDC) were obtained. Percentages of vertebrae in which readers agreed on the direction of change and on change >|SDC| were computed. RESULTS Overall, 1,053 (98% of all possible) vertebrae were assessed by each reader both at baseline and two years. Over two years, HU mean change values varied from -23 to 28 and 29 for reader 1 and 2, respectively. Inter-reader reliability of the two-year change-from-baseline values per vertebra was excellent: ICC:0.91-0.99; SDC:6-10; Bland-Altman plots were homoscedastic, with negligible systematic error between readers. Readers agreed on the direction of change in 88-96% and on change >|SDC| in 58-94% of vertebrae, per vertebral level, from C3 to L5. Overall, similar results were obtained across all vertebrae. CONCLUSION LdCT measurement of HU is a reliable method to assess two-year changes in trabecular bone density at each vertebra from C3-L5. Being reliable across all vertebrae, this methodology can aid the study of trabecular bone density changes over time in r-axSpA, a disease affecting the whole spine.
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Affiliation(s)
- Mary Lucy Marques
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, Coimbra University Hospital, Coimbra, Portugal.
| | | | | | - Monique Reijnierse
- Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands.
| | | | - Juergen Braun
- Rheumazentrum Ruhrgebiet Herne, Ruhr-University Bochum, Germany.
| | - Floris van Gaalen
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.
| | - Sofia Ramiro
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, Zuyderland Medical Center, Herleen, the Netherlands
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Foti G, Serra G, Iacono V, Marocco S, Bertoli G, Gori S, Zorzi C. Identification of Non-Traumatic Bone Marrow Oedema: The Pearls and Pitfalls of Dual-Energy CT (DECT). ACTA ACUST UNITED AC 2021; 7:387-396. [PMID: 34449751 PMCID: PMC8396255 DOI: 10.3390/tomography7030034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/09/2021] [Accepted: 08/16/2021] [Indexed: 11/25/2022]
Abstract
Dual-energy computed tomography (DECT) is an imaging technique widely used in traumatic settings to diagnose bone marrow oedema (BME). This paper describes the role of DECT in diagnosing BME in non-traumatic settings by evaluating its reliability in analyzing some of the most common painful syndromes. In particular, with an illustrative approach, the paper describes the possible use of DECT for the evaluation of osteochondral lesions of the knee and of the ankle, avascular necrosis of the hip, non-traumatic stress fractures, and other inflammatory and infectious disorders of the bones.
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Affiliation(s)
- Giovanni Foti
- Department of Radiology, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy
- Correspondence: ; Tel.: +39-0456013874
| | - Gerardo Serra
- Department of Anesthesia and Analgesic Therapy, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy;
| | - Venanzio Iacono
- Department of Orthopaedic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy; (V.I.); (C.Z.)
| | - Stefania Marocco
- Centre for Tropical Diseases, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy; (S.M.); (G.B.)
| | - Giulia Bertoli
- Centre for Tropical Diseases, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy; (S.M.); (G.B.)
| | - Stefania Gori
- Department of Oncology, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy;
| | - Claudio Zorzi
- Department of Orthopaedic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, 37042 Negrar, Italy; (V.I.); (C.Z.)
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