Slide 1

Dynamic Study Tri-phasic of Liver

The Plain of project Display

* 5 Min Anatomy .* 8 min The Technique .* 1 min Questions .

Radiographic Anatomy MRI

Overview of the abdomen

And here, we are about to describe one of the most important organ in the abdominal region.The liverThe liver is a large, meaty organ that sits on the right side of the Abdomen . Weighing about 3 pounds, the liver is reddish-brown in color and feels rubbery to the touch

Liver segments and lobulesThe liver has two large sections, called the right and the left lobes.And also consist of eight segments.The first segment is cuadateThe right contain 4 segmentsThe left are 3 segments .

Diagram showing the segments

livers functionThe liver's main job is to filter the blood coming from the digestive tract, before passing it to the rest of the body. The liver also detoxifies chemicals and metabolizes drugs. As it does so, the liver secretes bile that ends up back in the intestines. The liver also makes proteins important for blood clotting and other functions.

Blood supply and venous drainageThe blood supply of the liver is delivered through the portal vein and the hepatic artery. The hepatic artery brings oxygenated blood to the hepatic tissues, while the portal vein collects the deoxygenated blood from the abdominal contents and filters it, eliminating toxins and processing the nutrientsThe hepatic portal system is the system of veins comprising the hepatic portal vein and its tributaries. It is also called the portal venous system.

Diagram for the vascular system of liver

Biliary tractRIGHT AND LEFT HEPATIC DUCTS

MERGES TO FORM THE COMMON HEPATIC DUCT

COMMON HEPATIC DUCT LEAVEAS THE LIVER AND GOINING TO CYSTIC DUCT TO FORM THE COMMON BILE DUCT FINALLY DRAIN INTO THE DOEDENUM

And now; its time to discover how your abdomen looks like inside this Tunnel.

1. CORONAL PLANES

AXIAL PLANES

3. SAGITTAL PLANES

4. MR ANGIOGRAPHY

The Indications of MRI Liver

Indications

* Detection of focal hepatic lesions metastasis .

* Lesion characterization, e.g. cyst, focal fat, haemangioma, hepatocellular carcinoma .

* Evaluation of tumour response to treatment, e.g. post-chemotherapy or surgery .

* Evaluation of known or suspected congenital abnormalities .

The Technique of MRI Abdomen

Preparation . Position .

Examination .

Preparation

Ask the patient to undress and change into a hospital gown .

Ask the patient to remove all metal object including keys, coins .

Explain the procedure to the patient and answer questions .

Offer headphones for communicating with the patient and ear protection .

An intravenous line must be placed with extension tubing extending out of the magnetic bore .

Positioning

Position the patient in supine position with head pointing towards the magnet (head first supine) .

Position the patient over the spine coil and place the body coil over the upper abdomen (nipple down to iliac crest) .

Securely tighten the body coil using straps to prevent respiratory artefacts .

Give a pillow under the head and cushions under the legs for extra comfort .

Centre the laser beam localizer over xiphoid process of sternum .

Body Coil

3 Survey ( Scout ) .

Coronal - Axial - Sagittal

The Sequences Before Inject The Contrast

( Pre-Contrast )

1- Axial ( T2 T1 *T2 Heavy )

Plan the Axial slices on the Coronal plane ;

* angle the position block across the liver as shown.

* Check the positioning block in the other two planes.

* Slices must be sufficient to cover the whole liver from the diaphragm down to the iliac crest

2- Coronal ( T2 T1 )

Plan the coronal slices on the axial image;

* position the block across the liver as shown.

* Check in the other two planes , Slices must be sufficient to cover the whole liver from the anterior abdominal wall to the posterior abdominal wall .

The Sequences After Inject The Contrast +C

( Post-Contrast )

Arterial Pre ( Befor +c )

Dynamic post ( after Inject ) contrast T1 .

- Delayed Porto-venous

The Sequences +CAxial T1 (Arterial - Porto venous - Delayed )

Coronal T1 ( Porto venous )

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