A novel e-learning tool to improve knowledge and awareness of pelvic radiotherapy late effects: qualitative responses amongst therapeutic radiographers.

Objectives: This study aimed to investigate the effectiveness of a novel e-learning intervention to increase knowledge, awareness and confidence surrounding pelvic radiotherapy late effects amongst therapeutic radiographers (RTTs), and to change staff perceptions of responsibility in providing such information to patients. Methods: The e-learning intervention was developed using blended learning software (Articulate Global, New York). 23 therapeutic radiographers within a single UK radiotherapy institution received the e-learning. Semi-structured interviews and questionnaires were utilised pre- and post-intervention to obtain qualitative and quantitative results. Thematic analysis of coded interview responses identified recurring themes, whilst statistical analysis was conducted using a Wilcoxon signed-rank test. This first paper presents the qualitative results. Results: Thematic analysis revealed increased knowledge and awareness of pelvic radiotherapy late effects amongst participants. Five key themes were identified: Knowledge/Confidence; Consent; Professional Responsibility; Gaps within Practice and Time/Space. Whilst several staff reported increased confidence in discussing late effects with patients, further training utilising "blended" pedagogical approaches may be required to achieve longstanding improvements. Following e-learning, participants demonstrated increased professional responsibility to deliver late effects information to patients. Conclusion: The novel e-learning intervention increased staff knowledge, awareness and confidence surrounding pelvic radiotherapy late effects, whilst changing staff perceptions on professional responsibility in delivering such information. Advances in knowledge: The e-learning has been disseminated to all hospitals within the region including a new "Radiotherapy Late Effects Clinic", educating various healthcare professionals. Study recommendations have led to introduction of dedicated radiotherapy late effects modules on a novel MSc programme at a UK University.

Prospective study on late renal toxicity following postoperative chemoradiotherapy in gastric cancer.

PURPOSE: Postoperative chemoradiotherapy in gastric cancer improves locoregional control and survival. Reports on late toxicity, however, have been scarce thus far. Because renal toxicity is one of the most serious late complications in upper abdominal radiotherapy, we prospectively analyzed kidney function in patients who underwent postoperative chemoradiotherapy for gastric cancer. PATIENTS AND METHODS: In 44 patients, Tc99m-thiatide renography was performed before and at regular intervals after postoperative chemoradiotherapy. The left-to-right (L/R) ratio was used as an index of the relative kidney function. Mean L/R values were calculated for four follow-up time intervals. For all patients, kidney V20 (percentage of the volume of the kidney that received more than 20 Gy) and mean dose of both kidneys were retrieved from the three-dimensional dose-volume histograms. RESULTS: We observed a progressive decrease in left renal function of 11% (p = 0.012) after 6 months, up to 52% (p < 0.001) after >18 months. The V20 (left kidney) and mean left kidney dose were identified as parameters associated with decreased kidney function. Mean serum creatinine was increased from 74.6 micromol/L before treatment to 86.1 micromol/L at 1 year after chemoradiotherapy (p < 0.001). In patients with a follow-up of 18-28 months, one case of severe renovascular hypertension was observed. CONCLUSION: A progressive relative functional impairment of the left kidney in patients after postoperative chemoradiotherapy for gastric cancer is demonstrated. To optimize the survival benefit that can be established with adjuvant regimens, strategies to minimize the dose to the kidneys and other critical organs should be explored.

X-ray volumetric imaging in image-guided radiotherapy: the new standard in on-treatment imaging.

PURPOSE: X-ray volumetric imaging (XVI) for the first time allows for the on-treatment acquisition of three-dimensional (3D) kV cone beam computed tomography (CT) images. Clinical imaging using the Synergy System (Elekta, Crawley, UK) commenced in July 2003. This study evaluated image quality and dose delivered and assessed clinical utility for treatment verification at a range of anatomic sites. METHODS AND MATERIALS: Single XVIs were acquired from 30 patients undergoing radiotherapy for tumors at 10 different anatomic sites. Patients were imaged in their setup position. Radiation doses received were measured using TLDs on the skin surface. The utility of XVI in verifying target volume coverage was qualitatively assessed by experienced clinicians. RESULTS: X-ray volumetric imaging acquisition was completed in the treatment position at all anatomic sites. At sites where a full gantry rotation was not possible, XVIs were reconstructed from projection images acquired from partial rotations. Soft-tissue definition of organ boundaries allowed direct assessment of 3D target volume coverage at all sites. Individual image quality depended on both imaging parameters and patient characteristics. Radiation dose ranged from 0.003 Gy in the head to 0.03 Gy in the pelvis. CONCLUSIONS: On-treatment XVI provided 3D verification images with soft-tissue definition at all anatomic sites at acceptably low radiation doses. This technology sets a new standard in treatment verification and will facilitate novel adaptive radiotherapy techniques.