scholarly journals 3D non-invasive inspection of the skin lesions by close-range and low-cost photogrammetric techniques

2018 ◽  
Vol 37 (1) ◽  
pp. 63 ◽  
Author(s):  
Ahmet B. Orun ◽  
Eric Goodyer ◽  
Geoff Smith
Keyword(s):  
Skin Lesion ◽  
Imaging Techniques ◽  
Low Cost ◽  
Cost Effective ◽  
Skin Lesions ◽  
Surface Model ◽  
Non Invasive ◽  
System Solution ◽  
Common Causes ◽  
Close Range

In dermatology, one of the most common causes of skin abnormality is an unusual change in skin lesion structure which may exhibit very subtle physical deformation of its 3D shape. However the geometrical sensitivity of current cost-effective inspection and measurement methods may not be sufficient to detect such small progressive changes in skin lesion structure at micro-scale. Our proposed method could provide a low-cost, non-invasive solution by a compact system solution to overcome these shortcomings by using close-range photogrammetric imaging techniques to build a 3D surface model for a continuous observation of subtle changes in skin lesions and other features.

scholarly journals Close-Range Photogrammetry and Infrared Imaging for Non-Invasive Honeybee Hive Population Assessment

2018 ◽  
Vol 7 (9) ◽  
pp. 350 ◽  
Author(s):  
Luis López-Fernández ◽  
Susana Lagüela ◽  
Pablo Rodríguez-Gonzálvez ◽  
José Martín-Jiménez ◽  
Diego González-Aguilera
Keyword(s):  
Computer Vision ◽  
Infrared Imaging ◽  
Imaging Techniques ◽  
Population Level ◽  
Non Invasive ◽  
Close Range Photogrammetry ◽  
3D Geometry ◽  
Thermographic Imaging ◽  
Close Range ◽  
Bee Colonies

Close-range photogrammetry and thermographic imaging techniques are used for the acquisition of all the data needed for the non-invasive assessment of a honeybee hive population. Temperature values complemented with precise 3D geometry generated using novel close-range photogrammetric and computer vision algorithms are used for the computation of the inner beehive temperature at each point of its surface. The methodology was validated through its application to three reference beehives with different population levels. The temperatures reached by the exterior surfaces of the hives showed a direct correlation with the population level. In addition, the knowledge of the 3D reality of the hives and the position of each temperature value allowed the positioning of the bee colonies without the need to open the hives. This way, the state of honeybee hives regarding the growth of population can be estimated without disturbing its natural development.

EEG Based Detection of Alcoholics

2019 ◽  
pp. 141-160
Author(s):  
T. K. Padma Shri ◽  
N. Sriraam
Keyword(s):  
Human Brain ◽  
Imaging Techniques ◽  
Cost Effective ◽  
The Body ◽  
Long Term Effects ◽  
Non Invasive ◽  
Positron Emission ◽  
Signal Processing Algorithms ◽  
Magnetic Resonance Imaging Mri ◽  
Neuro Imaging

The short term and long term effects of alcohol on various organs of the body, especially on the human brain is well established by numerous studies. Invasive methods such as Transcranial Magnetic Stimulation (TMS) and non invasive imaging techniques such as Computed Tomography (CT), Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET), and functional MRI activated electro-encephalogram (EEG) have been used to study the changes in EEG activity due to alcoholism. Even with the advent of neuro imaging techniques, EEG happens to be an important tool for brain study providing a non- invasive and cost effective method to detect the effects of alcohol on the human brain. This paper discusses the harmful effects of alcohol on different organs of the body. The advances in the development of EEG signal processing algorithms over the past decade for alcoholic detection are reviewed and their limitations are reported. Further the use of EEG for mass screening of alcoholics and biometric application is discussed in detail.

EEG Based Detection of Alcoholics

2012 ◽  
Vol 1 (1) ◽  
pp. 59-76 ◽  
Author(s):  
T. K. Padma Shri ◽  
N. Sriraam
Keyword(s):  
Human Brain ◽  
Imaging Techniques ◽  
Cost Effective ◽  
The Body ◽  
Long Term Effects ◽  
Non Invasive ◽  
Positron Emission ◽  
Cost Effective Method ◽  
Magnetic Resonance Imaging Mri ◽  
Neuro Imaging

The short term and long term effects of alcohol on various organs of the body, especially on the human brain is well established by numerous studies. Invasive methods such as Transcranial Magnetic Stimulation (TMS) and non invasive imaging techniques such as Computed Tomography (CT), Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET), and functional MRI activated electro-encephalogram (EEG) have been used to study the changes in EEG activity due to alcoholism. Even with the advent of neuro imaging techniques, EEG happens to be an important tool for brain study providing a non- invasive and cost effective method to detect the effects of alcohol on the human brain. This paper discusses the harmful effects of alcohol on different organs of the body. The advances in the development of EEG signal processing algorithms over the past decade for alcoholic detection are reviewed and their limitations are reported. Further the use of EEG for mass screening of alcoholics and biometric application is discussed in detail.

scholarly journals Cultural Heritage Recording Utilising Low-Cost Closerange Photogrammetry

2011 ◽  
Vol 6 ◽  
pp. 185-192
Author(s):  
Melanie Kirchhöfer ◽  
Jim Chandler ◽  
Rene Wackrow
Keyword(s):  
Cultural Heritage ◽  
Low Cost ◽  
Cost Effective ◽  
Recording System ◽  
Exterior Orientation ◽  
Close Range Photogrammetry ◽  
Lay People ◽  
Close Range ◽  
English Heritage ◽  
Heritage Recording

Cultural heritage is under a constant threat of damage or even destruction and comprehensive and accurate recording is necessary to attenuate the risk of losing heritage or serve as basis for reconstruction. Cost effective and easy to use methods are required to record cultural heritage, particularly during a world recession, and close-range photogrammetry has proven potential in this area. Off-the-shelf digital cameras can be used to rapidly acquire data at low cost, allowing non-experts to become involved. Exterior orientation of the camera during exposure ideally needs to be established for every image, traditionally requiring known coordinated target points. Establishing these points is time consuming and costly and using targets can be often undesirable on sensitive sites. MEMS-based sensors can assist in overcoming this problem by providing small-size and low-cost means to directly determine exterior orientation for close-range photogrammetry. This paper describes development of an image-based recording system, comprising an off-the-shelf digital SLR camera, a MEMS-based 3D orientation sensor and a GPS antenna. All system components were assembled in a compact and rigid frame that allows calibration of rotational and positional offsets between the components. The project involves collaboration between English Heritage and Loughborough University and the intention is to assess the system’s achievable accuracy and practicability in a heritage recording environment. Tests were conducted at Loughborough University and a case study at St. Catherine’s Oratory on the Isle of Wight, UK. These demonstrate that the data recorded by the system can indeed meet the accuracy requirements for heritage recording at medium accuracy (1-4cm), with either a single or even no control points. As the recording system has been configured with a focus on low-cost and easy-to-use components, it is believed to be suitable for heritage recording by non-specialists. This offers the opportunity for lay people to become more involved in their local heritage, an important aspiration identified by English Heritage. Recently, mobile phones (smartphones) with integrated camera and MEMS-based orientation and positioning sensors have become available. When orientation and position during camera exposure is extracted, these phones establish off-the-shelf systems that can facilitate image-based recording with direct exterior orientation determination. Due to their small size and low-cost they have potential to further enhance the involvement of lay-people in heritage recording. The accuracy currently achievable will be presented also.

Ultrasound

2016 ◽  
Author(s):  
David Kane ◽  
Philip Platt
Keyword(s):  
Clinical Practice ◽  
Imaging Modality ◽  
Low Cost ◽  
Power Doppler ◽  
Skin Lesions ◽  
Early Arthritis ◽  
Full Potential ◽  
Clinical Correlation ◽  
Non Invasive ◽  
Time Movement

Musculoskeletal ultrasound (MSUS) is rapidly becoming a standard part of many rheumatologists’ daily clinical practice. MSUS is safe, increasingly widely available, relatively low cost, non-invasive, and hence very acceptable to the patient. Current problems with availability of training, mentoring, and accreditation procedures need to be overcome for MSUS to reach its full potential for rheumatologists. MSUS is capable of improving clinical diagnosis and the accuracy of intervention. MSUS is more sensitive than clinical examination in the detection of synovitis and effusion and is capable of rapid targeted assessment of widely spaced joints coupled with clinical correlation. MSUS has advantages over other imaging modalities; the ability to display dynamic real-time movement makes it the imaging modality of choice for tendon problems. It is significantly more sensitive than plain radiology in the demonstration of early erosive changes, and although its sensitivity is less than that of MRI for the detection of erosions it is far more practical, timely, and available. The combination of sensitivity in detection of synovitis, tenosynovitis, and erosions makes it an ideal imaging modality in the context of an early arthritis clinic. Power Doppler has been shown to be an effective way of evaluating synovitis and hence is of value in early diagnosis and monitoring of inflammatory arthritides. The accuracy of placement of local injection therapies is enhanced by MSUS, and it significantly increases the diagnostic success rate of aspiration of joints and bursas. The flexibility of ultrasound as a tool for rheumatologists is shown by its application in the assessment of vasculitides, peripheral nerve pathology, salivary glands, and skin lesions.

Ultrasound

2013 ◽  
Author(s):  
David Kane ◽  
Philip Platt
Keyword(s):  
Clinical Practice ◽  
Imaging Modality ◽  
Low Cost ◽  
Power Doppler ◽  
Skin Lesions ◽  
Early Arthritis ◽  
Full Potential ◽  
Clinical Correlation ◽  
Non Invasive ◽  
Time Movement

Musculoskeletal ultrasound (MSUS) is rapidly becoming a standard part of many rheumatologists' daily clinical practice. MSUS is safe, increasingly widely available, relatively low cost, non-invasive, and hence very acceptable to the patient. Current problems with availability of training, mentoring, and accreditation procedures need to be overcome for MSUS to reach its full potential for rheumatologists. MSUS is capable of improving clinical diagnosis and the accuracy of intervention. MSUS is more sensitive than clinical examination in the detection of synovitis and effusion and is capable of rapid targeted assessment of widely spaced joints coupled with clinical correlation. MSUS has advantages over other imaging modalities; the ability to display dynamic real-time movement makes it the imaging modality of choice for tendon problems. It is significantly more sensitive than plain radiology in the demonstration of early erosive changes, and although its sensitivity is less than that of MRI for the detection of erosions it is far more practical, timely, and available. The combination of sensitivity in detection of synovitis, tenosynovitis, and erosions makes it an ideal imaging modality in the context of an early arthritis clinic. Power Doppler has been shown to be an effective way of evaluating synovitis and hence is of value in early diagnosis and monitoring of inflammatory arthritides. The accuracy of placement of local injection therapies is enhanced by MSUS, and it significantly increases the diagnostic success rate of aspiration of joints and bursas. The flexibility of ultrasound as a tool for rheumatologists is shown by its application in the assessment of vasculitides, peripheral nerve pathology, salivary glands, and skin lesions.

scholarly journals Ultrasonographic Evaluation of Maxillofacial Swelling in a Pediatric Patient with Xeroderma Pigmentosum

2019 ◽  
Vol 23 (3) ◽  
pp. 163-166
Author(s):  
Cansu Görürgöz ◽  
Nilsu Sakalli ◽  
Ferah Mutlu Kul ◽  
Nurhan Uslu Özalp
Keyword(s):  
Xeroderma Pigmentosum ◽  
Autosomal Recessive ◽  
Cost Effective ◽  
Skin Lesions ◽  
Imaging Method ◽  
Oral Lesions ◽  
The Sun ◽  
Non Invasive ◽  
Malignant Skin ◽  
Tip Of The Tongue

Summary Background/Aim: Xeroderma pigmentosum (XP) is an autosomal recessive skin disease. Affected patients have skin problems, oral mucosa and neurologic symptoms. In these patients, erythematous, hyperpigmented or malignant skin lesions may occur in the sun-exposed areas. Leukoplakia, erythroplakia, and squamous cell carcinoma of the tip of the tongue and lips are common oral lesions associated with XP. Case report: Treatment of the disease included protection from ultraviolet radiation, topical application to treat actinic keratitis, and multidisciplinary approaches by physicians. Conclusions: Even though USG in dentistry is not very common, it is a non-invasive, cost-effective, readily available and repeatable diagnostic imaging method. Thus, USG should take place as a routine diagnostic tool in dentistry, especially for patients who are medically compromised.

scholarly journals Photography in dermatology: Basic concepts

2021 ◽  
Vol 1 ◽  
pp. 43
Author(s):  
Paola Pasquali ◽  
Feroze Kaliyadan
Keyword(s):  
Imaging Techniques ◽  
Skin Lesions ◽  
Teaching And Research ◽  
Non Invasive ◽  
The Past ◽  
Medical Photography ◽  
Basic Concepts

Photography of skin lesions has always been among the most popular non-invasive imaging techniques, one that assists in documenting and monitoring as well as teaching and research. Its importance has become more apparent in the past year with the COVID-19 pandemic and the sudden widespread use of teledermatology. Basic concepts of medical photography and using a proper camera are fundamental to obtain good quality images.

Ultrasound and alternative multimodality imaging of intra-abdominal and pelvic cystic masses in the newborn

Ultrasound ◽  
2021 ◽  
pp. 1742271X2098481
Author(s):  
Weiyong Lee ◽  
Margaret YW Lee ◽  
Harvey Teo
Keyword(s):  
Multimodality Imaging ◽  
Low Cost ◽  
Multicystic Dysplastic Kidney ◽  
Non Invasive ◽  
Dysplastic Kidney ◽  
Wide Range ◽  
Common Causes ◽  
Pictorial Essay ◽  
Cystic Masses

Introduction: Ultrasound is used commonly to detect and diagnose intra-abdominal and pelvic cystic masses in the newborn as it is easily available, relatively low cost, and non-invasive. Discussion: The diagnosis can be made or narrowed down by determining the location, size, sonographic features, organ involvement, and internal vascularity. The differential diagnoses include hydronephrosis, multicystic dysplastic kidney, adrenal haemorrhage, cystic teratomas, ovarian cysts, enteric cysts, meconium cysts, and liver haemangiomas. With the appropriate radiological knowledge, the ultrasound practitioner can help obtain an accurate diagnosis. Conclusion: This pictorial essay will familiarise the reader with the different common causes of intra-abdominal and pelvic masses detected on ultrasound through a wide range of conditions. The role of ultrasound in the evaluation of these conditions will be discussed and alternative imaging correlates will be offered.

scholarly journals Non-Invasive Analysis of Actinic Keratosis before and after Topical Treatment Using a Cold Stimulation and Near-Infrared Spectroscopy

Medicina ◽  
2020 ◽  
Vol 56 (9) ◽  
pp. 482
Author(s):  
Silvia Seoni ◽  
Paola Savoia ◽  
Federica Veronese ◽  
Elisa Zavattaro ◽  
Vanessa Tarantino ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Skin Lesion ◽  
Near Infrared Spectroscopy ◽  
Topical Treatment ◽  
Near Infrared ◽  
Skin Lesions ◽  
Cold Stimulation ◽  
Non Invasive ◽  
Before And After ◽  
Ice Pack

Background and objectives: The possible evolution of actinic keratoses (AKs) into invasive squamous cell carcinomas (SCC) makes their treatment and monitoring essential. AKs are typically monitored before and after treatment only through a visual analysis, lacking a quantitative measure to determine treatment effectiveness. Near-infrared spectroscopy (NIRS) is a non-invasive measure of the relative change of oxy-hemoglobin and deoxy-hemoglobin (O2Hb and HHb) in tissues. The aim of our study is to determine if a time and frequency analysis of the NIRS signals acquired from the skin lesion before and after a topical treatment can highlight quantitative differences between the AK skin lesion area. Materials and Methods: The NIRS signals were acquired from the skin lesions of twenty-two patients, with the same acquisition protocol: baseline signals, application of an ice pack near the lesion, removal of ice pack and acquisition of vascular recovery. We calculated 18 features from the NIRS signals, and we applied multivariate analysis of variance (MANOVA) to compare differences between the NIRS signals acquired before and after the therapy. Results: The MANOVA showed that the features computed on the NIRS signals before and after treatment could be considered as two statistically separate groups, after the ice pack removal. Conclusions: Overall, the NIRS technique with the cold stimulation may be useful to support non-invasive and quantitative lesion analysis and regression after a treatment. The results provide a baseline from which to further study skin lesions and the effects of various treatments.

Sign in / Sign up

Export Citation Format

Share Document