Multimodal mental imagery.

When I am looking at my coffee machine that makes funny noises, this is an instance of multisensory perception - I perceive this event by means of both vision and audition. But very often we only receive sensory stimulation from a multisensory event by means of one sense modality, for example, when I hear the noisy coffee machine in the next room, that is, without seeing it. The aim of this paper is to bring together empirical findings about multimodal perception and empirical findings about (visual, auditory, tactile) mental imagery and argue that on occasions like this, we have multimodal mental imagery: perceptual processing in one sense modality (here: vision) that is triggered by sensory stimulation in another sense modality (here: audition). Multimodal mental imagery is not a rare and obscure phenomenon. The vast majority of what we perceive are multisensory events: events that can be perceived in more than one sense modality - like the noisy coffee machine. And most of the time we are only acquainted with these multisensory events via a subset of the sense modalities involved - all the other aspects of these multisensory events are represented by means of multisensory mental imagery. This means that multisensory mental imagery is a crucial element of almost all instances of everyday perception.

A comparison of the psychological burden of PET/MRI and PET/CT scans and association to initial state anxiety and previous imaging experiences.

OBJECTIVE: To investigate the level of psychological burden experienced by patients undergoing positron emission tomography (PET)/MRI scanning compared with PET/CT. METHODS: 100 adult patients referred for PET/CT and underwent PET/MRI scanning were eligible. Initial state, psychological burden of PET/CT and PET/MRI, scan satisfaction and preference were assessed using a purpose-designed questionnaire, comprising 61 five-point Likert scale questions and a three-point tick box question indicating preference between PET/CT and PET/MRI. State anxiety was assessed using the state portion of the State Trait Anxiety Inventory. Wilcoxon signed-rank tests compared psychological burden experienced by participants following PET/CT and PET/MRI scan. RESULTS: A greater level of psychological burden was experienced by patients during PET/MRI than PET/CT p ≤ 0.001, consistent with patients' preference for PET/CT over PET/MRI (p = 0.013). There was a significant relationship between PET/CT psychological burden and initial state (r = 0.386, p ≤ 0.001). No significant relationship was identified between Initial state and psychological burden of PET MRI (r = -0.089; p = 217). There was a significant relationship between psychological burden of PET/CT and PET/MRI (r = 0.354; p = 0.001). CONCLUSION: Patients' experience increased psychological burden during PET/MRI compared with PET/CT. Previous scanning experiences and patients' interactions prior to and during PET/MRI improved patient satisfaction. Interventions could be implemented to improve imaging outcome. ADVANCES IN KNOWLEDGE: This study provides evidence for the increased psychological burden of PET/MRI compared with PET/CT, and that people prefer the PET/CT procedure. We have shown that the patients who expressed a preference for PET/MRI demonstrated significantly lower psychological burden for that procedure than those that preferred PET/CT, which indicates that the benefit of reduced psychological burden could be facilitated by an appropriate intervention.

Reduction of patient anxiety in PET/CT imaging by improving communication between patient and technologist.

UNLABELLED: Patients experience anxiety during imaging procedures because of the confined space, uncertainty about the procedure, worry about the results, and other concerns. When a patient experiences anxiety during PET/CT imaging, the quality of the scan can be affected in several ways. Current patient-technologist communication is limited in PET/CT because the technologist must be separated from the patient during the course of the imaging workflow. This study investigated the use of a call device enabling rapid communication to reduce patient anxiety. METHODS: Clinical patients with various oncologic indications and undergoing (18)F-FDG PET/CT imaging were asked to participate in anxiety surveys under several conditions. Metrics were tracked regarding the survey results for comparison between groups and survey conditions. During the course of this study, 2 patient surveys were used. One of the patient populations was asked to fill out a survey on personal perceptions of the use of such a device, with questions related to their comfort with the device and the degree to which they perceived the device to reduce their anxiety. The 2 remaining populations were given a standard Spielberger State Anxiety survey for anxiety assessments against control populations. RESULTS: Perception survey results indicated that 75% of the respondents experienced a reduction in anxiety and that 84% would request this type of device for other procedures. A correlation was observed between improved patient-technologist communication and perceived feelings of safety, with identical percentages of positive responses. Although responses were mostly positive, 18.8% did not perceive any reduction in anxiety, and the same number indicated they would not use the system in the future. For those patients given the standard Spielberger State Anxiety survey, a statistically significant reduction in anxiety was observed (P < 0.05) in those patients given a call device. Reductions in anxiety were observed for all patient populations, including first-time and repeated-imaging patients. CONCLUSION: Patient anxiety can be reduced through the use of a tangible device that improves communication between the patient and the imaging staff. Reducing anxiety may have a positive effect on imaging, because involuntary motion may be reduced and there may be improvement in the patients' comfort and in their overall experience with the imaging procedure.

[Diagnostic imaging studies: do they create anxiety?]. / Pruebas de diagnóstico por la imagen: ¿generan ansiedad?

UNLABELLED: Cancer is one of the main health problems in western countries. In 2008, it represented the first cause of death in men and the second one in women. When there is a diagnosis or suspicion of cancer, performing diagnostic imaging studies has an important role in the clinical activity and may have an elevated psychological impact. OBJECTIVE: The purpose of this study was to evaluate the level of anxiety in oncology patients during the performance of a nuclear medicine study (PET-CT) in a Nuclear Medicine Service, by means of the State Trait Anxiety Inventory (STAI). MATERIAL AND METHODS: A total of 200 cancer patients who underwent a PET-CT study in a Nuclear Medicine Service were administered the STAI to evaluate the level of anxiety generated during this test. The STAI is a validated questionnaire developed as a research tool on anxiety in healthy adults. RESULTS: Of the 200 patients, two thirds (n=135) (67%) of the patients evaluated had anxiety. Of the 133, 93 (70%) of the patients who underwent PET-CT study for the first time were anxious whereas 42 (62.7%) of the patients who had undergone the study on previous occasions were anxious. Those patients with the greatest anxiety were those in whom the study was performed to initially stage the disease. CONCLUSION: Performing the PET-CT study as an initial staging method and/or to evaluate tumor recurrence is an important and statistically significant generator of anxiety. There is a high emotional and cognitive impact associated to the participation of the diagnostic tests.