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Hip MRI

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https://www.readbyqxmd.com/read/29776852/indications-for-mars-mri-in-patients-treated-with-articular-surface-replacement-xl-total-hip-arthroplasty
#1
James W Connelly, Vincent P Galea, Inari Laaksonen, Sean J Matuszak, Rami Madanat, Orhun Muratoglu, Henrik Malchau
BACKGROUND: The purpose of this study was to identify which patient and clinical factors are predictive of adverse local tissue reaction (ALTR) and to use these factors to create a highly sensitive algorithm for indicating metal artifact reduction sequence magnetic resonance imaging (MARS-MRI) in Articular Surface Replacement (ASR) XL total hip arthroplasty patients. Our secondary aim was to compare our algorithm to existing national guidelines on when to take MARS-MRI in metal-on-metal total hip arthroplasty patients...
April 19, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29759011/preservation-technique-of-the-piriformis-tendon-is-superior-to-reattachment-technique-in-terms-of-contiguity-and-muscle-atrophy-using-magnetic-resonance-imaging
#2
So Minokawa, Masatoshi Naito, Kei Shiramizu, Yoshinari Nakamura, Koichi Kinoshita, Tomohiko Minamikawa, Hajime Seo, Takuaki Yamamoto
PURPOSE: The preservation technique of the piriformis tendon during the posterolateral approach in total hip arthroplasty (THA) is reportedly superior to the reattachment technique in terms of dislocation. However, the long-term effects of preservation of the piriformis tendon during THA remain unknown. In this study, we evaluated the contiguity of the piriformis/conjoined tendon and atrophy of the piriformis/internal obturator muscle during a long-term postoperative follow-up using magnetic resonance imaging (MRI)...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29758582/-relevance-of-mri-after-closed-reduction-of-traumatic-hip-dislocation-in-children
#3
Christoph Mauritz Strüwind, Christian von Rüden, Andreas Thannheimer, Volker Bühren, Dorien Schneidmueller
BACKGROUND: Traumatic hip dislocation in children and adolescents is a rare entity that typically results from high-energy trauma. After closed joint reduction, further treatment depends on the specific pattern of the lesion as identified using cross sectional imaging. The aim of this retrospective analysis was to evaluate relevant side effects after traumatic hip dislocation in children and adolescents in order to examine the need for focused diagnostics. PATIENTS/MATERIAL AND METHODS: This retrospective analysis covered 8 adolescents under 18 years suffering isolated traumatic hip joint dislocation between 2001 and 2017...
May 14, 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29756502/mri-prevalence-and-characteristics-of-supraacetabular-fossae-in-patients-with-hip-pain
#4
Nickolas Boutris, Stephanie L Gardner, Thomas R Yetter, Domenica A Delgado, Luis Pulido, Joshua D Harris
BACKGROUND: Supraacetabular fossae (SAF) are normal anatomic variants found at the 12 o'clock position of the acetabulum and can be mistaken for osteochondral defects. PURPOSE: Determine SAF prevalence on MRI of patients with hip pain. Characterise SAF by type, size, and location. Determine sensitivity of radiology reports and sensitivity of radiographs in SAF detection. METHODS: MRIs performed over 1 year in patients with hip/groin pain were analysed for SAF...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29750829/robust-trabecular-microstructure-in-type-2-diabetes-revealed-by-individual-trabecula-segmentation-analysis-of-hr-pqct-images
#5
Jessica F Starr, Leonardo C Bandeira, Sanchita Agarwal, Ankit M Shah, Kyle K Nishiyama, Yizhong Hu, Donald J McMahon, X Edward Guo, Shonni J Silverberg, Mishaela R Rubin
Type 2 diabetes (T2D) patients have an increased fracture risk, which may be partly explained by compromised bone microarchitecture within the cortical bone compartment. Data on trabecular bone parameters in T2D are contradictory. By high resolution peripheral quantitative computed tomography (HR-pQCT) trabecular microarchitecture is preserved, yet larger trabecular holes are detected in T2D by MRI and DXA-based trabecular bone scores (TBS) are abnormal. To determine if there are differences in trabecular microstructure, connectivity and alignment in postmenopausal women with T2D as compared to controls, we performed individual trabecula segmentation (ITS) analysis on high-resolution peripheral quantitative computed tomography (HR-pQCT) scans of the distal radius and tibia in 92 women with (n = 42) and without (n = 50) T2D...
May 11, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29744647/cell-therapy-versus-simultaneous-contralateral-decompression-in-symptomatic-corticosteroid-osteonecrosis-a-thirty-year-follow-up-prospective-randomized-study-of-one-hundred-and-twenty-five-adult-patients
#6
Philippe Hernigou, Arnaud Dubory, Yasuhiro Homma, Isaac Guissou, Charles Henri Flouzat Lachaniette, Nathalie Chevallier, Hélène Rouard
PURPOSE: Symptomatic osteonecrosis related to corticosteroids has a high risk of progression to collapse in absence of treatment. The purposes of this study were to evaluate the results of autologous bone marrow grafting of the symptomatic hip in adult patients with osteonecrosis and to compare the results with core decompression alone in the contralateral symptomatic hip. MATERIALS AND METHODS: A total of 125 consecutive patients (78 males and 47 females) with bilateral osteonecrosis (ON) and who had both hips symptomatic and at the same stage on each side (stage I or II) were included in this study from 1988 to 1998...
May 9, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29734501/using-multidimensional-topological-data-analysis-to-identify-traits-of-hip-osteoarthritis
#7
Jasmine Rossi-deVries, Valentina Pedoia, Michael A Samaan, Adam R Ferguson, Richard B Souza, Sharmila Majumdar
BACKGROUND: Osteoarthritis (OA) is a multifaceted disease with many variables affecting diagnosis and progression. Topological data analysis (TDA) is a state-of-the-art big data analytics tool that can combine all variables into multidimensional space. TDA is used to simultaneously analyze imaging and gait analysis techniques. PURPOSE: To identify biochemical and biomechanical biomarkers able to classify different disease progression phenotypes in subjects with and without radiographic signs of hip OA...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29733696/mri-assessment-of-supra-and-infratrochanteric-femoral-torsion-association-with-femoroacetabular-impingement-and-hip-dysplasia
#8
Benjamin Fritz, Susanne Bensler, Michael Leunig, Patrick O Zingg, Christian W A Pfirrmann, Reto Sutter
OBJECTIVE: The objective of our study was to evaluate a novel measurement technique for assessing the supra- and infratrochanteric components of femoral torsion, establish reference values in healthy volunteers, and compare supra- and infratrochanteric torsion angles in patients with hip dysplasia and patients with femoroacetabular impingement (FAI) with those in healthy volunteers. MATERIALS AND METHODS: Femoral torsion was assessed in 380 patients and 61 healthy volunteers on MRI...
May 7, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29730703/narrowing-of-ischiofemoral-and-quadratus-femoris-spaces-in-pediatric-ischiofemoral-impingement
#9
Shlomit Goldberg-Stein, Avi Friedman, Qi Gao, Jaeun Choi, Jacob Schulz, Eric Fornari, Benjamin Taragin
OBJECTIVE: To correlate MRI findings of quadratus femoris muscle edema (QFME) with narrowing of the ischiofemoral space (IFS) and quadratus femoris space (QFS) in children, and to identify threshold values reflecting an anatomic architecture that may predispose to ischiofemoral impingement. MATERIALS AND METHODS: A case-control retrospective MRI review of 49 hips in 27 children (mean, 13 years) with QFME was compared to 49 hips in 27 gender and age-matched controls...
May 5, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29727407/three-dimensional-mri-analysis-of-femoral-head-remodeling-after-reduction-in-patients-with-developmental-dysplasia-of-the-hip
#10
Yuta Tsukagoshi, Hiroshi Kamada, Makoto Kamegaya, Ryoko Takeuchi, Shogo Nakagawa, Yohei Tomaru, Kenta Tanaka, Mio Onishi, Tomofumi Nishino, Masashi Yamazaki
BACKGROUND: Previous reports on patients with developmental dysplasia of the hip (DDH) showed that the prereduced femoral head was notably smaller and more nonspherical than the intact head, with growth failure observed at the proximal posteromedial area. We evaluated the shape of the femoral head cartilage in patients with DDH before and after reduction, with size and sphericity assessed using 3-dimensional (3D) magnetic resonance imaging (MRI). METHODS: We studied 10 patients with unilateral DDH (all female) who underwent closed reduction...
May 2, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29721359/acute-cauda-equina-syndrome-following-orthopedic-procedures-as-a-result-of-epidural-anesthesia
#11
Lisa B E Shields, Vasudeva G Iyer, Yi Ping Zhang, Christopher B Shields
Background: Cauda equina syndrome (CES) is a rare complication of spinal or epidural anesthesia. It is attributed to direct mechanical injury to the spinal roots of the cauda equina that may result in saddle anesthesia and paraplegia with bowel and bladder dysfunction. Case Description: The first patient underwent a hip replacement and received 5 mL of 1% lidocaine epidural anesthesia. Postoperatively, when the patient developed an acute CES, the lumbar magnetic resonance imaging (MRI) scan demonstrated clumping/posterior displacement of nerve roots of the cauda equina consistent with adhesive arachnoiditis attributed to the patient's previous L4-L5 lumbar decompression/fusion...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29718744/osteonecrosis-in-children-with-acute-lymphoblastic-leukemia-at-initial-diagnosis-and-prior-to-any-chemotherapy
#12
Kathinka Krull, Marina Kunstreich, Annika Bronsema, Kirsten Bleckmann, Carl-Friedrich Classen, Bernhard Erdlenbruch, Norbert Jorch, Reinhard Kolb, Alfred Leipold, Olga Moser, Aram Prokop, Wolfram Scheurlen, Daniel Steinbach, Janina Klasen-Sansone, Dirk Klee, Gabriele Escherich, Anja Moericke, Martin Schrappe, Arndt Borkhardt, Michaela Kuhlen
Osteonecrosis (ON) is a common and debilitating side effect of anti-leukemic treatment in children with acute lymphoblastic leukemia (ALL). However, the impact of leukemia itself on ON development remains elusive. We analyzed 76 children enrolled in the ongoing OPAL trial, who had magnetic resonance imaging (MRI) studies at diagnosis. MRI screening revealed 14 osteonecrotic lesions (5 × hips, 9 × knees) of any grade (I-III) in 7 (9.2%) patients. Six months on, the number of ON per patient increased (1 patient), remained constant (2), and decreased (2)...
May 2, 2018: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/29713768/is-it-painful-to-be-different-sciatic-nerve-anatomical-variants-on-mri-and-their-relationship-to-piriformis-syndrome
#13
Adam L Bartret, Christopher F Beaulieu, Amelie M Lutz
OBJECTIVES: To investigate the purported relationship between sciatic nerve variant anatomy and piriformis syndrome. METHODS: Over 49 months, 1039 consecutive noncontrast adult hip MRIs were completed for various clinical indications. Repeat and technically insufficient studies were excluded. Radiologists categorized sciatic nerve anatomy into Beaton and Anson anatomical types. Chart review using our institution's cohort search and navigation tool determined the prevalence of the explicit clinical diagnosis of piriformis syndrome (primary endpoint) and sciatica and buttock pain (secondary endpoints)...
April 30, 2018: European Radiology
https://www.readbyqxmd.com/read/29708190/3-t-mri-implant-safety-heat-induction-with-new-dual-channel-radiofrequency-transmission-technology
#14
Nadja A Farshad-Amacker, Daniel Nanz, Arjun Thanbanbalasingam, Gustav Andreisek, Mathias Nittka, Roger Luechinger
We aimed to investigate whether different transmission settings of the dual-transmit technology may influence the amount of heat induction around an implant material dependent on its location within the magnetic field. Metallic hip implants were positioned in the magnet of a 3-T scanner at various lateral offset positions in relation to the magnetic axis in a body-phantom tank filled with polyacrylic acid gel. The temperature increase close to the implants was measured during turbo spin-echo scanning using dual-channel parallel radiofrequency (RF) transmission with circular in comparison to elliptic RF polarization...
2018: European radiology experimental
https://www.readbyqxmd.com/read/29704036/evaluation-of-articular-cartilage-following-rotational-acetabular-osteotomy-for-hip-dysplasia-using-t2-mapping-mri
#15
Takeshi Shoji, Takuma Yamasaki, Soutaro Izumi, Mikiya Sawa, Yuji Akiyama, Yuji Yasunaga, Nobuo Adachi
BACKGROUND: Rotational acetabular osteotomy (RAO) is one of the surgical treatments for acetabular dysplasia, and satisfactory results have been reported. We evaluated the postoperative changes of articular cartilage and whether the pre-operative condition of the articular cartilage influences the clinical results using T2 mapping MRI. METHODS: We reviewed 31 hips with early stage osteoarthritis in 31 patients (mean age, 39.6 years), including three men and 28 women who underwent RAO for hip dysplasia...
April 27, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29704023/radiological-analysis-of-cystic-lesion-in-osteonecrosis-of-the-femoral-head
#16
Fuqiang Gao, Jun Han, Zike He, Zirong Li
PURPOSE: Cystic lesions are a common complication in osteonecrosis of the femoral head (ONFH). This study will discuss the cause of cystic lesion formation and the feature of cystic lesion distribution in ONFH. According to the feature of cystic lesion in ONFH, we will discuss the possible mechanisms of cystic lesions and their  influence on collapse of the femoral head. MATERIALS AND METHODS: We retrospectively gathered 102 ONFH patients (168 hips) from November in 2015 to August in 2016 on China-Japan Friendship Hospital...
April 27, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29701093/the-natural-alpha-angle-of-the-femoral-head-neck-junction
#17
H Gollwitzer, C Suren, C Strüwind, H Gottschling, M Schröder, L Gerdesmeyer, P M Prodinger, R Burgkart
Aims Asphericity of the femoral head-neck junction is common in cam-type femoroacetabular impingement (FAI) and usually quantified using the alpha angle on radiographs or MRI. The aim of this study was to determine the natural alpha angle in a large cohort of patients by continuous circumferential analysis with CT. Methods CT scans of 1312 femurs of 656 patients were analyzed in this cross-sectional study. There were 362 men and 294 women. Their mean age was 61.2 years (18 to 93). All scans had been performed for reasons other than hip disease...
May 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29696410/utility-of-immediate-postoperative-hip-mri-in-developmental-hip-dysplasia-closed-vs-open-reduction
#18
Siddharth P Jadhav, Snehal R More, Vinitha Shenava, Wei Zhang, J Herman Kan
BACKGROUND: Magnetic resonance imaging (MRI) of the hips is being increasingly used to confirm hip reduction after surgery and spica cast placement for developmental dysplasia of the hip (DDH). OBJECTIVE: To review a single institutional experience with post-spica MRI in children undergoing closed or open hip reduction and describe the utility of MRI in directing the need for re-intervention. MATERIALS AND METHODS: Seventy-four patients (52 female, 22 male) who underwent post-spica hip MRI over a 6-year period were retrospectively reviewed...
April 25, 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29695596/amyloid-deposition-and-brain-structure-as-long-term-predictors-of-mci-dementia-and-mortality
#19
Oscar L Lopez, James T Becker, YueFang Chang, William E Klunk, Chester Mathis, Julia Price, Howard J Aizenstein, Beth Snitz, Ann D Cohen, Steven T DeKosky, Milos Ikonomovic, M Ilyas Kamboh, Lewis H Kuller
OBJECTIVES: To test the hypothesis that brain structural integrity (i.e., hippocampal [HIP] volume), white matter lesions (WMLs), and β-amyloid deposition are associated with long-term increased risk of incident dementia and mortality in 183 cognitively normal individuals and patients with mild cognitive impairment (MCI) aged 80 years and older. METHODS: All participants had a brain structural MRI scan and PET scan with 11 C-labeled Pittsburgh compound B in 2009 and were reexamined yearly through 2015 (mean follow-up time 5...
April 25, 2018: Neurology
https://www.readbyqxmd.com/read/29691613/lesion-size-measurement-in-femoral-head-necrosis
#20
Marvin E Steinberg, Seong C Oh, Viviane Khoury, Jayaram K Udupa, David R Steinberg
BACKGROUND: Management of patients with early stages of osteonecrosis of the femoral head remains controversial. Uniform use of an effective method of evaluation and classification, including both stage and lesion size, would allow for comparison and would significantly improve treatment of patients. There is no consensus on how best to determine lesion size. The purpose of this study was to evaluate and compare accuracy and ease of use of different techniques for determining the size of femoral head lesions...
April 25, 2018: International Orthopaedics
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