Image guidance: past and future of radiotherapy.

Image guidance: past and future of radiotherapy. Radiologe. 2019 Jul 25;: Authors: Herrmann H, Seppenwoolde Y, Georg D, Widder J Abstract Image guidance has been playing a decisive role throughout the history of radiotherapy, but developments in 3D-and 4D imaging data acquisition using computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET) have significantly boosted the precision of conformal radiotherapy. An overarching aim of radiotherapy is conforming the treatment dose to the tumor in order to optimally limit a high radiation dose outside the target. Stereotactic, intensity modulated, and adaptive radiotherapy are all largely based on appropriately using imaging information both before and during treatment delivery using on-board imaging devices. While pretreatment imaging for planning has reached a very high level in the past two decades, the next step will be to further refine and accelerate imaging during treatment delivery, resulting in adaptation of the dose fluence during a patient's treatment in various scenarios, some of which are discussed in this article. PMID: 31346650 [PubMed - as supplied by publisher]
Source: Der Radiologe - Category: Radiology Authors: Tags: Radiologe Source Type: research

Related Links:

Authors: Gulak MA, Bornais C, Shin S, Murphy L, Smylie J, Pantarotto JR, Fung-Kee-Fung M, Maziak DE Abstract Background: Patients with lung cancer often experience stressful delays throughout the diagnostic phase of care. To address that situation, our multidisciplinary team created a "Navigation Day," during which patients partake in a single-day visit that comprises nurse-led teaching, social work, smoking cessation counselling, symptom control, and dedicated test slots for integrated positron-emission tomography and computed tomography (pet/ct), pulmonary function tests (pfts), and magnetic resonance i...
Source: Current Oncology - Category: Cancer & Oncology Tags: Curr Oncol Source Type: research
ConclusionMesenteric cysts represent a rare cause of intra-abdominal mass. Owing to low prevalence, literature is limited as is guidance on management. Careful pre-operative planning is essential so as to avoid operative complications. Imaging such as USS is of great importance; however Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) may be of more benefit, owing to the complex anatomical relations within which mesenteric cysts can present. Surgical excision is widely reported as the surgical treatment of choice for symptomatic cysts
Source: International Journal of Surgery Case Reports - Category: Surgery Source Type: research
ConclusionsFixation for cervical instability is a critical component of the management of DS. A minority of patients receiving surgery were identified through asymptomatic screening. There was a high complication risk associated with surgery in our study; however, the addition of rigid fixation has lessened the complication rate compared with previous studies.Level of EvidenceLevel IV.
Source: Spine Deformity - Category: Orthopaedics Source Type: research
Publication date: Available online 9 November 2019Source: Epilepsy &BehaviorAuthor(s): Kristie Bauman, Orrin Devinsky, Anli A. LiuAbstractCareful study of the clinical outcomes of temporal lobe epilepsy (TLE) surgery has greatly advanced our knowledge of the neuroanatomy of human memory. After early cases resulted in profound amnesia, the critical role of the hippocampus and associated medial temporal lobe (MTL) structures to declarative memory became evident. Surgical approaches quickly changed to become unilateral and later, to be more precise, potentially reducing cognitive morbidity. Neuropsychological studies foll...
Source: Epilepsy and Behavior - Category: Neurology Source Type: research
ConclusionsThe described technique allows for a precise anatomical identification of the recorded brain areas and thus to draw strong conclusions about the role of each targeted cortical area in the behavior under study.
Source: Journal of Neuroscience Methods - Category: Neuroscience Source Type: research
Lung cancer has been identified as the leading cause of cancer-related deaths worldwide and one of the most common malignancies in China [1]. More and more non-small cell lung cancer (NSCLC) patients have been observed in the screening projects for detection of early stage lung cancer with the use of low dose computed tomography (CT) [2]. Accurate imaging for evaluation of the Lymph Node Metastases (LNM) could affect the treatment of these patients [3]. Many imaging modalities such as CT, Magnetic Resonance Imaging (MRI), Positron Emission Tomography-CT (PET-CT), as well as other diagnostic techniques like ultrasound-guide...
Source: Lung Cancer - Category: Cancer & Oncology Authors: Source Type: research
Abstract Careful study of the clinical outcomes of temporal lobe epilepsy (TLE) surgery has greatly advanced our knowledge of the neuroanatomy of human memory. After early cases resulted in profound amnesia, the critical role of the hippocampus and associated medial temporal lobe (MTL) structures to declarative memory became evident. Surgical approaches quickly changed to become unilateral and later, to be more precise, potentially reducing cognitive morbidity. Neuropsychological studies following unilateral temporal lobe resection (TLR) have challenged early models, which simplified the lateralization of verbal a...
Source: Epilepsy and Behaviour - Category: Neurology Authors: Tags: Epilepsy Behav Source Type: research
Int Arch Otorhinolaryngol 2020; 24: e86-e95 DOI: 10.1055/s-0039-1697005 Introduction The most common site of salivary gland tumors is the parotid gland. Computed tomography (CT), magnetic resonance imaging (MRI), and sonography are imaging modalities to differentiate benign from malignant parotid tumors. Objective The aim of this study is the evaluation of the diagnostic value of perfusion CT for differentiating histological categorization of benign and malignant parotid tumors. Methods A total of 29 patients with parotid neoplasms were enrolled in this study. Mean age and all CT perfusion variables...
Source: International Archives of Otorhinolaryngology - Category: ENT & OMF Authors: Tags: Original Research Source Type: research
CONCLUSIONS: It is suggested that ZTE-MRI provides clinically reliable images for bone assessment in TMJ disorder. MRI may become a beneficial diagnostic tool for patients with both TMJ disc and bone pathology, with advantages involving medical costs and radiation dose. PMID: 31670578 [PubMed - as supplied by publisher]
Source: Dentomaxillofacial Radiology - Category: Radiology Tags: Dentomaxillofac Radiol Source Type: research
Publication date: Available online 1 November 2019Source: Operative Techniques in Otolaryngology-Head and Neck SurgeryAuthor(s): Einat SlonimskyThe purpose of this article is to describe key anatomical feature of the larynx and to review contemporary imaging protocols for the evaluation of nonmalignant lesions and pathologies of the larynx. The role of computed tomography (CT), magnetic resonance imaging, and positron emission tomography CT in the evaluation of laryngeal pathologies will be addressed. Imaging feature in CT and magnetic resonance imaging is discussed in particular conditions, such as cysts and laryngoceles,...
Source: Operative Techniques in Otolaryngology Head and Neck Surgery - Category: ENT & OMF Source Type: research
More News: CT Scan | MRI Scan | PET Scan | Radiology