Magnetic Resonance Imaging (MRI) is a non-invasive examination designed to produce detailed images of the human body by utilising a strong magnetic field and radio waves. MRI is suitable for imaging most body parts (such as musculoskeletal and neurological systems) and is useful for check-up, medical diagnosis, staging of disease and follow-up without exposing the body to radiation.
The MRI machine uses a strong magnetic field and radio waves to generate signals from hydrogen nuclei (protons) in your body. Protons can be found in water molecules, which is abundant in human. The signals received would then be used to generate images of your body.
To offer the most advanced, accurate and efficient MRI service in Hong Kong, We have 2 Siemens “MAGNETOM Aera 1.5T”MRI scanners on board. This versatile and high-technology MRI scanner allows examinations to be performed with exceptional quality and speed (Tim 4G technology) and at the same time producing consistent results efficiently (Dot engine). Last but not least is the degree of comfort for patients. With its 70cm bore and ultra-short system length of 145cm, patients are put at ease with the roominess of the scanner and more examinations can be performed with patient’s head outside the bore hence reducing claustrophobic cases. Also, with advanced noise reduction technology, examinations are quieter and noise could be reduced as much as 70% in certain examinations.
In computed tomography, or CT in short, X ray beam rotates around an object to produce multiple projections. The acquired data will be processed by computer to create multiple cross-sectional images. It enables viewing of the internal structures of different body parts. It is one of the most widely used cross-sectional imaging techniques.
We are using Siemens SOMATOM Drive. It is one of the highest-end models on the market, incorporated with dual source and the latest technology. Only 3 machines are available in Hong Kong.
Our dual source CT scanner has two sets of x-ray tubes and detectors that can emit X Ray and acquire data at the same time. In contrast to the conventional single source CT, dual source CT can acquire images twice faster.
The novel technologies in SOMATOM Drive further improve precision, efficiency and patient safety without compromising image quality. The scanner has unique features of superfast scanning time to minimize breathing and motion artifacts, lower radiation dose, and lesser contrast media requirement. Thus, patient experience can be improved. It also has various advanced clinical applications such as cardiovascular imaging, functional imaging, pediatric and elderly imaging.
PET is an advanced medical imaging modality which provides detailed information on the function of an organ or system in the body. PET scans are commonly used to evaluate and diagnose cancers, neurological disorders of the brain and cardiovascular diseases. The radiopharmaceutical is injected to patient’s body prior to the scan and images of the body are then acquired by a gamma camera in the PET scanner during the scan. The camera detects the photon emitted from the injected radiopharmaceutical in the body, and a multi-dimensional image of the examined body part will eventually be generated by the computer. The injected radiopharmaceutical usually accumulates in the diseased tissues more than the healthy tissues.
PET has an innate pitfall that it is not able to locate the signals precisely, meaning that the emitted photons or signals from the patient’s body cannot be addressed to a precise location over the tissues or organs in the images. However, by incorporating the functional information acquired from the PET scan into the “anatomical map” provided by the CT scan, doctors will be able to understand the exact location and extent of the disease, and an effective treatment plan can then be formulated.
3D mammography, or digital breast tomosynthesis, is an advanced breast imaging technology approved by the U.S. Food and Drug Administration in 2011. 3D mammography produces multiple slices of low dose X-ray images of the breast from different angles, creating a 3D picture. In contrast, conventional mammography only creates 2D breast images from 2 angles. 3D mammography allows early detection of pathological changes of the breasts such as lumps, masses or tumours- well before it is noticeable by patients. It makes the diagnosis by radiologists far easier by reviewing the 3D reconstruction breast images slice by slice.
Better detection. Fast. Low dose.
The Hologic 3D Mammography technology provides extraordinarily sharp images. It is proven to detect an average 41% more invasive breast cancers and 40% less false positive callbacks than the conventional 2D mammogram alone. The newly improved technology even reduces the compression of the breast to 3.7 seconds, together with the ergonomic design of the machine, patient comfort is maximised. This revolutionary system also provides the world’s first and only tomosynthesis-guided biopsy, approved by the US Food and Drug Administration. 3D mammography has comparable radiation dose with conventional 2D mammography. The C-view software is able to produce 2D images from the tomosynthesis data, resulting in a low dose mammography exam.
Women who are age 40 or above are recommended to have the screening mammogram every 2 years by the Hong Kong Breast Cancer Foundation (HKBCF). For those who have signs and symptoms of breast cancers or have a strong family history of breast cancer, you are advised to seek medical help and book an appointment for mammography screening as soon as possible. Early detection of breast cancer makes it curable and saves lives.
Ultrasound imaging uses high-frequency sound waves to produce live pictures of the inside of the body. It involves the use of a small transducer (probe) and ultrasound gel placed directly on the skin. High- frequency sound waves are transmitted from the probe through the gel into the body. The transducer collects the sounds that bounce back and a computer then uses those sound waves to create an image. It is used to help diagnose diseases of the internal organs, to examine a baby in pregnant women, and the brain and hips in infants. It’s also used to help guide biopsies and diagnose heart conditions. Ultrasound is safe, painless, non-invasive, and unlike X-ray and CT scan, does not use ionizing radiation.
Because ultrasound images are captured in real-time, they can show the structure and movement of the body's internal organs, blood flowing through the vessels, as well as fetal movement within the uterus.
Conventional ultrasound displays the images in 2D. Advancements in ultrasound technology include three- dimensional (3-D) ultrasound that formats the sound wave data into 3-D images. Doppler ultrasound is a special technique that allows the radiologist to see and evaluate blood flow through arteries and veins in the abdomen, arms, legs, neck and/or brain (in infants and children) or within various body organs such as the liver or kidneys.
Ultrasound waves are disrupted by air or gas; therefore ultrasound is not an ideal imaging technique for air-filled bowel or organs obscured by the bowel. In most cases, barium exams, CT scanning, and MRI are the methods of choice in such a setting.
Ultrasound also has difficulty penetrating bone (except in infants who have more cartilage in their skeletons). For visualizing bones or certain joints, other imaging modalities such as X-ray, CT scan or MRI are typically used.